TuringDB Docs

MATCH: Pattern Matching

MATCH (n) RETURN n
MATCH (n:Person {name: 'Alice'}) RETURN n.age
MATCH (a:Person)-->(b:Company) RETURN a.name, b.name

() → Node
[] → Edge
- → Undirected edge
Node labels: :Label - e.g. (n:Person)
Edge types: :EDGE_TYPE - e.g. -[:KNOWS]-> (one edge type per edge)
Properties: {key: 'value', age: 30}

CREATE: Add Nodes & Edges

CREATE (:Person {name: 'Alice', age: 30})
CREATE (:Person {name: 'Mick'})-[:FRIEND_OF]->(:Person {name: 'John'})
CREATE (a)-[:EDGE]->(b), (b)-[:EDGE]->(c), (c)-[:EDGE]->(a)

CREATE (gabby:Person {name: 'Gabby', age: 27}),
(susan:Person {name: 'Susan', age: 35}),
(lynette:Person {name: 'Lynette', age: 41}),
(bree:Person {name: 'Bree', age: 42}),
(gabby)-[FRIEND_OF]->(susan),
(gabby)-[FRIEND_OF]->(lynette),
...

Labels required for node creation
No RETURN clause
Use commas to create multiple items at once

MATCH + CREATE and MATCH + CREATE + RETURN

// Create two nodes Person
CREATE (:Person {name: 'Alice', age: 24}),
	   (:Person {name: 'John', age: 27})

// Match two nodes to create the edge between them
MATCH (n:Person {name: 'Alice'}), (m:Person {name: 'John'})
CREATE (n)-[:FRIENDS_WITH]->(m)

// RETURN clause can also be added
MATCH (n:Person {name: 'Alice'}), (m:Person {name: 'John'})
CREATE (n)-[:FRIENDS_WITH]->(m)
RETURN n.name, n.age, m.name, m.age

SET: Update Properties

// Update a single property
MATCH (n:Person {name: 'Alice'})
SET n.age = 30

// Update multiple properties at once
MATCH (n:Person {name: 'Alice'})
SET n.position = 'Developer', n.surname = 'Taylor'

// Update from an expression
MATCH (p:Product)
SET p.discountPrice = p.price * (1 - 0.15)

// Update edge property
MATCH (n:Person {name: 'Alice'})-[e:KNOWS]->(m:Person {name: 'Bob'})
SET e.since = 2020

// Set an embedding vector
MATCH (n:Person {name: 'Alice'})
SET n.emb = (1.2, 2.0, 0.0, 12.0)

// Set an embedding vector by node ID
MATCH (n) WHERE n = 1234
SET n.emb = (1.2, 2.0, 0.0, 12.0)

// Conditional update with WHERE
MATCH (n:Person)
WHERE n.age < 18
SET n.isMinor = true

Always used with MATCH, not CREATE
Creates the property if it does not already exist
Use COMMIT to persist changes

WHERE: Filter nodes and edges by properties

To filter on node label:

MATCH (n)
WHERE n:Person
RETURN n, n.age

To filter on node property:

MATCH (n)
WHERE n.name = 'Alice'
RETURN n, n.age

To filter on edge label:

MATCH (n)-[e]->(m)
WHERE e:PLAY_POKER_TOGETHER
RETURN n.name, m.age

To filter on edge property:

MATCH (n)-[e]->(m:Person)
WHERE n.name = 'Gabby'
AND e.play_poker_together = true
RETURN n.name, m.age

Edge type filtering

// Match only edges of a given type
MATCH (n:Person)-[:KNOWS]->(m:Person) RETURN n.name, m.name

// Name the edge to also return its properties
MATCH (n:Person)-[e:KNOWS]->(m:Person) RETURN n.name, e.since, m.name

// One edge type per hop
MATCH (a:Person)-[:KNOWS]->(b:Person)-[:WORKS_AT]->(c:Company) RETURN a.name, b.name, c.name

// List the edge types in the graph
CALL db.edgeTypes()

An edge has exactly one edge type, so a pattern takes a single [:EDGE_TYPE] constraint

SKIP and LIMIT

// Return first 10 results
MATCH (n) RETURN n LIMIT 10

// Pagination: skip 10, return next 10
MATCH (n) RETURN n SKIP 10 LIMIT 10

ORDER BY

// Sort ascending (default)
MATCH (n:Person) RETURN n.name, n.age ORDER BY n.age

// Sort descending
MATCH (n:Person) RETURN n.name, n.age ORDER BY n.age DESC

// Sort by multiple properties
MATCH (n:Person) RETURN n.name, n.age, n.city ORDER BY n.city, n.age DESC

// Combined with pagination
MATCH (n:Person) RETURN n.name, n.age ORDER BY n.age DESC SKIP 10 LIMIT 10

Joins and Cartesian Products

// Cartesian product: all combinations of Person × Interest
MATCH (a:Person), (b:Interest) RETURN a.name, b.name

// Three-way cartesian product
MATCH (p:Person), (i:Interest), (c:Category) RETURN p.name, i.name, c.name

// Join on shared variable: persons sharing an interest
MATCH (a:Person)-->(b:Interest)<--(c:Person)
WHERE a.name <> c.name
RETURN a.name, b.name, c.name

// With explicit edge types
MATCH (a:Person)-[:INTERESTED_IN]->(b:Interest)<-[:INTERESTED_IN]-(c:Person)
WHERE a.name <> c.name
RETURN a.name, b.name, c.name

// Multi-hop join
MATCH (a:Person)-->(i:Interest)-->(c:Category)
RETURN a.name, i.name, c.name

// Mix path + cartesian product
MATCH (a:Person)-->(i:Interest), (c:Category)
WHERE c.name = 'Cat1'
RETURN a.name, i.name, c.name

// Two independent paths (cartesian of each path's results)
MATCH (a:Person)-->(i1:Interest), (b:Person)-->(i2:Interest)
WHERE a.name <> b.name
RETURN a.name, i1.name, b.name, i2.name

Comma , separates independent patterns
Shared variables between patterns create joins
Unrelated patterns create cartesian products (N × M rows)

Property Match Operators

MATCH (n {name: 'Alice'}) RETURN n
// exact equivalent of
MATCH (n) WHERE n.name = 'Alice' RETURN n

: → exact match using property filter in node directly
= → exact match using property filter in WHERE clause

Boolean operators

OR

MATCH (n:Person)
WHERE n.medication = "Aspirin"
OR n.medication = "Ibuprofen"
RETURN n.name

AND

MATCH (n)
WHERE n.name = 'Matt'
AND n.age = 20
AND n.hasPhD = false
RETURN n

Comparison operators

Equal: =

# Find antibodies targeting proteins in Human
MATCH (ab:Antibody)-->(prot:Protein)
WHERE prot.host = 'Human'
RETURN ab.name, prot.name

Inequal: <>

# Find antibodies (associated to a protein) used together
# in same publication (2-hop)
MATCH (ab1:Antibody)-->(prot:Protein), (ab2:Antibody)-->(prot:Protein)
WHERE ab1.name <> ab2.name
RETURN ab1.name, ab2.name, prot.name, prot.gene_name

Less than: <
Less than or equal to: <=
Greater than: >

Greater than or equal to: >=

# Publications published on 2020 or after
MATCH (pub:Publication)
WHERE pub.published_year >= 2020
RETURN pub.displayName, pub.pubmedid, pub.published_year, pub.country

is null:IS NULL

is not null:IS NOT NULL

# Publications from the United States
MATCH (pub:Publication)
WHERE pub.country = 'United States'
AND pub.institution IS NOT NULL
RETURN pub.displayName, pub.institution, pub.published_year

Data Types

Type	Example
String	`'hello'` or `"hello"`
Integer	`age=30`
Boolean	`flag=true`
Double	`score=3.14`
Embedding	`emb=(1.2, 2.0, 0.0)`

RETURN Clause

MATCH (n)-->(m) RETURN n.name, n.age, m.name, m.age

Select fields with RETURN n.prop, m.prop

Expression evaluation

// Multiply property by constant
MATCH (n) RETURN n.price * 1.1

// Divide two properties
MATCH ()-[r]->() RETURN r.a / r.b

// Add two properties
MATCH (n) RETURN n.val + n.tax

LOAD graphs

Load TuringDB graph

Files have to be available in graphs subdirectory of turing-dir.

LOAD GRAPH graph_name

Load external data into TuringDB graph

Files have to be available in data subdirectory of turing-dir.

LOAD GML 'mygml.gml' AS my_graph

LOAD JSONL 'myjsonl.jsonl' AS my_graph

Procedures (`CALL`)

Query	Description
`CALL db.labels()`	All node labels
`CALL db.propertyTypes()`	All node/edge property keys & types
`CALL db.edgeTypes()`	All edge types
`CALL db.history()`	Commit history
`CALL db.describeCommit('<hash>')`	Counts for a single commit
`CALL db.procedures()`	List available procedures
`CALL db.showIndexes()`	List property indexes

Procedure outputs can be YIELDed and chained: CALL db.labels() YIELD label MATCH (n) WHERE n.name = label RETURN n.

DELETE

// Delete a node
MATCH (n:Person {name: 'Alice'}) DELETE n

// Delete an edge
MATCH (n)-[e:KNOWS]->(m) DELETE e

Variable-length paths

// Postfix quantifiers (not Neo4j's -[*1..3]-)
MATCH (a:Person)-[e]->+(b:Person) RETURN a, b      // one or more hops
MATCH (a:Person)-[e]->*(b:Person) RETURN a, b      // zero or more hops
MATCH (a:Person)-[e]->{2,4}(b:Interest) RETURN a, b // 2 to 4 hops

Graph algorithms

Function	Description
`shortestPath(n, m, distanceProperty, distOutputVar, pathOutputVar)`	Shortest path between nodes using the Dijkstra processor

Functions

Function	Description
`labels(n)`	Node label as a string
`edgeType(e)`	Edge type as a string
`toInteger(expr)`	Parses a string as an integer
`toFloat(expr)`	Parses a string as a float
`toBoolean(expr)`	Parses a string as a boolean
`cosine_similarity(a, b)`	Cosine similarity of two embeddings
`euclidean_distance(a, b)`	Euclidean distance of two embeddings

Aggregate Functions

Function	Description
`count(expr)`	Returns the number of non-null rows in the column corresponding to `expr`
`avg(expr)`	Returns the average value of non-null rows in the numeric-valued column corresponding to `expr`

// Introspection
MATCH (n)-[e]->(m) RETURN labels(n), edgeType(e)

// Type conversion
MATCH (n) WHERE n.year > toInteger("2020") RETURN n.name
MATCH (n) RETURN n.price * toFloat("1.07")

// Aggregation
MATCH (n:Person) RETURN count(*)

Engine Commands

Command	Description
`CREATE GRAPH <name>`	Create a new named graph
`LOAD GRAPH <name>`	Load an existing graph
`LOAD GML 'mygraph.gml' AS my_graph`	Load the specified GML as TuringDB graph. Requires the GML to be accessible in TuringDB directory (`-turing-dir`, `data` subdir)
`LOAD JSONL 'mygraph.jsonl' AS my_graph`	Load the specified JSONL as TuringDB graph. Requires the JSONL to be accessible in TuringDB directory (`-turing-dir`, `data` subdir)
`COMMIT`	Persist intermediate state within a change (needed between separate node/edge create steps)
`LOAD COMMIT '<hash>'`	Load a past commit into memory (needed for REST API queries on non-HEAD commits; CLI and SDK do this automatically)
`LIST GRAPH`	List all available graphs
`HISTORY`	Show commit history (versioning)
`CHANGE NEW`	Create a new isolated change
`CHANGE SUBMIT`	Merge current change into main
`CHANGE DELETE`	Delete current change
`CHANGE LIST`	List active uncommitted changes
`CREATE VECTOR INDEX <name> WITH DIMENSION <n> METRIC <COSINE\|EUCLID>`	Create a vector index
`VECTOR SEARCH IN <index> FOR <k> (<vec>) YIELD ids`	k-nearest-neighbor vector search
`SHOW VECTOR INDEXES` / `DELETE VECTOR INDEX <name>`	List / delete vector indexes
`CREATE INDEX <name> FOR (n) ON n.prop` / `FOR [e] ON e.prop`	Create a property index (write; commit to take effect)
`DROP INDEX <name>`	Drop a property or vector index
`MERGE_DATAPARTS`	Compact the current graph’s DataParts into one
`INSTALL <ext>` / `SHOW EXTENSIONS` / `SHOW PROCEDURES`	Load a procedure extension / list extensions / list procedures
`LOAD CSV "<file>" [WITH HEADERS] [ON ERROR SKIP\|FAIL] AS row`	Stream CSV rows (see CSV import)

UNWIND

// Expand a literal list into rows (literal lists only)
UNWIND [1, 2, 3] AS x RETURN x

// Return a list literal directly
RETURN [1, 2, 3] AS nums

Property indexes

// Indexes are writes — create inside a change, then commit
CHANGE NEW
CREATE INDEX age_index FOR (n) ON n.age
CHANGE SUBMIT
MATCH (n) WHERE n.age = 30 RETURN n   // optimizer uses the index

DROP INDEX age_index                  // remove

Useful Patterns

// Two-hop connection
MATCH (a)-[r1]->(b)-[r2]->(c) RETURN c

// All people named John
MATCH (n:Person {name: 'John'}) RETURN n
/// exact equivalent of
MATCH (n:Person) WHERE n.name = 'John' RETURN n

// Find co-authors: two persons linked to the same publication
MATCH (a:Person)-->(p:Publication)<--(b:Person)
WHERE a.name <> b.name
RETURN a.name, b.name, p.title

// Match existing nodes then create edge between them
MATCH (n:Person {name: 'Alice'}), (m:Person {name: 'Bob'})
CREATE (n)-[:KNOWS]->(m)

// Cartesian: pair every person with every city
MATCH (p:Person), (c:City) RETURN p.name, c.name

Query Language JSONL

MATCH: Pattern Matching

MATCH (n) RETURN n
MATCH (n:Person {name: 'Alice'}) RETURN n.age
MATCH (a:Person)-->(b:Company) RETURN a.name, b.name

() → Node
[] → Edge
- → Undirected edge
Node labels: :Label - e.g. (n:Person)
Edge types: :EDGE_TYPE - e.g. -[:KNOWS]-> (one edge type per edge)
Properties: {key: 'value', age: 30}

CREATE: Add Nodes & Edges

CREATE (:Person {name: 'Alice', age: 30})
CREATE (:Person {name: 'Mick'})-[:FRIEND_OF]->(:Person {name: 'John'})
CREATE (a)-[:EDGE]->(b), (b)-[:EDGE]->(c), (c)-[:EDGE]->(a)

CREATE (gabby:Person {name: 'Gabby', age: 27}),
(susan:Person {name: 'Susan', age: 35}),
(lynette:Person {name: 'Lynette', age: 41}),
(bree:Person {name: 'Bree', age: 42}),
(gabby)-[FRIEND_OF]->(susan),
(gabby)-[FRIEND_OF]->(lynette),
...

Labels required for node creation
No RETURN clause
Use commas to create multiple items at once

MATCH + CREATE and MATCH + CREATE + RETURN

// Create two nodes Person
CREATE (:Person {name: 'Alice', age: 24}),
	   (:Person {name: 'John', age: 27})

// Match two nodes to create the edge between them
MATCH (n:Person {name: 'Alice'}), (m:Person {name: 'John'})
CREATE (n)-[:FRIENDS_WITH]->(m)

// RETURN clause can also be added
MATCH (n:Person {name: 'Alice'}), (m:Person {name: 'John'})
CREATE (n)-[:FRIENDS_WITH]->(m)
RETURN n.name, n.age, m.name, m.age

SET: Update Properties

// Update a single property
MATCH (n:Person {name: 'Alice'})
SET n.age = 30

// Update multiple properties at once
MATCH (n:Person {name: 'Alice'})
SET n.position = 'Developer', n.surname = 'Taylor'

// Update from an expression
MATCH (p:Product)
SET p.discountPrice = p.price * (1 - 0.15)

// Update edge property
MATCH (n:Person {name: 'Alice'})-[e:KNOWS]->(m:Person {name: 'Bob'})
SET e.since = 2020

// Set an embedding vector
MATCH (n:Person {name: 'Alice'})
SET n.emb = (1.2, 2.0, 0.0, 12.0)

// Set an embedding vector by node ID
MATCH (n) WHERE n = 1234
SET n.emb = (1.2, 2.0, 0.0, 12.0)

// Conditional update with WHERE
MATCH (n:Person)
WHERE n.age < 18
SET n.isMinor = true

Always used with MATCH, not CREATE
Creates the property if it does not already exist
Use COMMIT to persist changes

WHERE: Filter nodes and edges by properties

To filter on node label:

MATCH (n)
WHERE n:Person
RETURN n, n.age

To filter on node property:

MATCH (n)
WHERE n.name = 'Alice'
RETURN n, n.age

To filter on edge label:

MATCH (n)-[e]->(m)
WHERE e:PLAY_POKER_TOGETHER
RETURN n.name, m.age

To filter on edge property:

MATCH (n)-[e]->(m:Person)
WHERE n.name = 'Gabby'
AND e.play_poker_together = true
RETURN n.name, m.age

Edge type filtering

// Match only edges of a given type
MATCH (n:Person)-[:KNOWS]->(m:Person) RETURN n.name, m.name

// Name the edge to also return its properties
MATCH (n:Person)-[e:KNOWS]->(m:Person) RETURN n.name, e.since, m.name

// One edge type per hop
MATCH (a:Person)-[:KNOWS]->(b:Person)-[:WORKS_AT]->(c:Company) RETURN a.name, b.name, c.name

// List the edge types in the graph
CALL db.edgeTypes()

An edge has exactly one edge type, so a pattern takes a single [:EDGE_TYPE] constraint

SKIP and LIMIT

// Return first 10 results
MATCH (n) RETURN n LIMIT 10

// Pagination: skip 10, return next 10
MATCH (n) RETURN n SKIP 10 LIMIT 10

ORDER BY

// Sort ascending (default)
MATCH (n:Person) RETURN n.name, n.age ORDER BY n.age

// Sort descending
MATCH (n:Person) RETURN n.name, n.age ORDER BY n.age DESC

// Sort by multiple properties
MATCH (n:Person) RETURN n.name, n.age, n.city ORDER BY n.city, n.age DESC

// Combined with pagination
MATCH (n:Person) RETURN n.name, n.age ORDER BY n.age DESC SKIP 10 LIMIT 10

Joins and Cartesian Products

// Cartesian product: all combinations of Person × Interest
MATCH (a:Person), (b:Interest) RETURN a.name, b.name

// Three-way cartesian product
MATCH (p:Person), (i:Interest), (c:Category) RETURN p.name, i.name, c.name

// Join on shared variable: persons sharing an interest
MATCH (a:Person)-->(b:Interest)<--(c:Person)
WHERE a.name <> c.name
RETURN a.name, b.name, c.name

// With explicit edge types
MATCH (a:Person)-[:INTERESTED_IN]->(b:Interest)<-[:INTERESTED_IN]-(c:Person)
WHERE a.name <> c.name
RETURN a.name, b.name, c.name

// Multi-hop join
MATCH (a:Person)-->(i:Interest)-->(c:Category)
RETURN a.name, i.name, c.name

// Mix path + cartesian product
MATCH (a:Person)-->(i:Interest), (c:Category)
WHERE c.name = 'Cat1'
RETURN a.name, i.name, c.name

// Two independent paths (cartesian of each path's results)
MATCH (a:Person)-->(i1:Interest), (b:Person)-->(i2:Interest)
WHERE a.name <> b.name
RETURN a.name, i1.name, b.name, i2.name

Comma , separates independent patterns
Shared variables between patterns create joins
Unrelated patterns create cartesian products (N × M rows)

Property Match Operators

MATCH (n {name: 'Alice'}) RETURN n
// exact equivalent of
MATCH (n) WHERE n.name = 'Alice' RETURN n

: → exact match using property filter in node directly
= → exact match using property filter in WHERE clause

Boolean operators

OR

MATCH (n:Person)
WHERE n.medication = "Aspirin"
OR n.medication = "Ibuprofen"
RETURN n.name

AND

MATCH (n)
WHERE n.name = 'Matt'
AND n.age = 20
AND n.hasPhD = false
RETURN n

Comparison operators

Equal: =

# Find antibodies targeting proteins in Human
MATCH (ab:Antibody)-->(prot:Protein)
WHERE prot.host = 'Human'
RETURN ab.name, prot.name

Inequal: <>

# Find antibodies (associated to a protein) used together
# in same publication (2-hop)
MATCH (ab1:Antibody)-->(prot:Protein), (ab2:Antibody)-->(prot:Protein)
WHERE ab1.name <> ab2.name
RETURN ab1.name, ab2.name, prot.name, prot.gene_name

Less than: <
Less than or equal to: <=
Greater than: >

Greater than or equal to: >=

# Publications published on 2020 or after
MATCH (pub:Publication)
WHERE pub.published_year >= 2020
RETURN pub.displayName, pub.pubmedid, pub.published_year, pub.country

is null:IS NULL

is not null:IS NOT NULL

# Publications from the United States
MATCH (pub:Publication)
WHERE pub.country = 'United States'
AND pub.institution IS NOT NULL
RETURN pub.displayName, pub.institution, pub.published_year

Data Types

Type	Example
String	`'hello'` or `"hello"`
Integer	`age=30`
Boolean	`flag=true`
Double	`score=3.14`
Embedding	`emb=(1.2, 2.0, 0.0)`

RETURN Clause

MATCH (n)-->(m) RETURN n.name, n.age, m.name, m.age

Select fields with RETURN n.prop, m.prop

Expression evaluation

// Multiply property by constant
MATCH (n) RETURN n.price * 1.1

// Divide two properties
MATCH ()-[r]->() RETURN r.a / r.b

// Add two properties
MATCH (n) RETURN n.val + n.tax

LOAD graphs

Load TuringDB graph

Files have to be available in graphs subdirectory of turing-dir.

LOAD GRAPH graph_name

Load external data into TuringDB graph

Files have to be available in data subdirectory of turing-dir.

LOAD GML 'mygml.gml' AS my_graph

LOAD JSONL 'myjsonl.jsonl' AS my_graph

Procedures (`CALL`)

Query	Description
`CALL db.labels()`	All node labels
`CALL db.propertyTypes()`	All node/edge property keys & types
`CALL db.edgeTypes()`	All edge types
`CALL db.history()`	Commit history
`CALL db.describeCommit('<hash>')`	Counts for a single commit
`CALL db.procedures()`	List available procedures
`CALL db.showIndexes()`	List property indexes

Procedure outputs can be YIELDed and chained: CALL db.labels() YIELD label MATCH (n) WHERE n.name = label RETURN n.

DELETE

// Delete a node
MATCH (n:Person {name: 'Alice'}) DELETE n

// Delete an edge
MATCH (n)-[e:KNOWS]->(m) DELETE e

Variable-length paths

// Postfix quantifiers (not Neo4j's -[*1..3]-)
MATCH (a:Person)-[e]->+(b:Person) RETURN a, b      // one or more hops
MATCH (a:Person)-[e]->*(b:Person) RETURN a, b      // zero or more hops
MATCH (a:Person)-[e]->{2,4}(b:Interest) RETURN a, b // 2 to 4 hops

Graph algorithms

Function	Description
`shortestPath(n, m, distanceProperty, distOutputVar, pathOutputVar)`	Shortest path between nodes using the Dijkstra processor

Functions

Function	Description
`labels(n)`	Node label as a string
`edgeType(e)`	Edge type as a string
`toInteger(expr)`	Parses a string as an integer
`toFloat(expr)`	Parses a string as a float
`toBoolean(expr)`	Parses a string as a boolean
`cosine_similarity(a, b)`	Cosine similarity of two embeddings
`euclidean_distance(a, b)`	Euclidean distance of two embeddings

Aggregate Functions

Function	Description
`count(expr)`	Returns the number of non-null rows in the column corresponding to `expr`
`avg(expr)`	Returns the average value of non-null rows in the numeric-valued column corresponding to `expr`

// Introspection
MATCH (n)-[e]->(m) RETURN labels(n), edgeType(e)

// Type conversion
MATCH (n) WHERE n.year > toInteger("2020") RETURN n.name
MATCH (n) RETURN n.price * toFloat("1.07")

// Aggregation
MATCH (n:Person) RETURN count(*)

Engine Commands

Command	Description
`CREATE GRAPH <name>`	Create a new named graph
`LOAD GRAPH <name>`	Load an existing graph
`LOAD GML 'mygraph.gml' AS my_graph`	Load the specified GML as TuringDB graph. Requires the GML to be accessible in TuringDB directory (`-turing-dir`, `data` subdir)
`LOAD JSONL 'mygraph.jsonl' AS my_graph`	Load the specified JSONL as TuringDB graph. Requires the JSONL to be accessible in TuringDB directory (`-turing-dir`, `data` subdir)
`COMMIT`	Persist intermediate state within a change (needed between separate node/edge create steps)
`LOAD COMMIT '<hash>'`	Load a past commit into memory (needed for REST API queries on non-HEAD commits; CLI and SDK do this automatically)
`LIST GRAPH`	List all available graphs
`HISTORY`	Show commit history (versioning)
`CHANGE NEW`	Create a new isolated change
`CHANGE SUBMIT`	Merge current change into main
`CHANGE DELETE`	Delete current change
`CHANGE LIST`	List active uncommitted changes
`CREATE VECTOR INDEX <name> WITH DIMENSION <n> METRIC <COSINE\|EUCLID>`	Create a vector index
`VECTOR SEARCH IN <index> FOR <k> (<vec>) YIELD ids`	k-nearest-neighbor vector search
`SHOW VECTOR INDEXES` / `DELETE VECTOR INDEX <name>`	List / delete vector indexes
`CREATE INDEX <name> FOR (n) ON n.prop` / `FOR [e] ON e.prop`	Create a property index (write; commit to take effect)
`DROP INDEX <name>`	Drop a property or vector index
`MERGE_DATAPARTS`	Compact the current graph’s DataParts into one
`INSTALL <ext>` / `SHOW EXTENSIONS` / `SHOW PROCEDURES`	Load a procedure extension / list extensions / list procedures
`LOAD CSV "<file>" [WITH HEADERS] [ON ERROR SKIP\|FAIL] AS row`	Stream CSV rows (see CSV import)

UNWIND

// Expand a literal list into rows (literal lists only)
UNWIND [1, 2, 3] AS x RETURN x

// Return a list literal directly
RETURN [1, 2, 3] AS nums

Property indexes

// Indexes are writes — create inside a change, then commit
CHANGE NEW
CREATE INDEX age_index FOR (n) ON n.age
CHANGE SUBMIT
MATCH (n) WHERE n.age = 30 RETURN n   // optimizer uses the index

DROP INDEX age_index                  // remove

Useful Patterns

// Two-hop connection
MATCH (a)-[r1]->(b)-[r2]->(c) RETURN c

// All people named John
MATCH (n:Person {name: 'John'}) RETURN n
/// exact equivalent of
MATCH (n:Person) WHERE n.name = 'John' RETURN n

// Find co-authors: two persons linked to the same publication
MATCH (a:Person)-->(p:Publication)<--(b:Person)
WHERE a.name <> b.name
RETURN a.name, b.name, p.title

// Match existing nodes then create edge between them
MATCH (n:Person {name: 'Alice'}), (m:Person {name: 'Bob'})
CREATE (n)-[:KNOWS]->(m)

// Cartesian: pair every person with every city
MATCH (p:Person), (c:City) RETURN p.name, c.name

Query Language JSONL

​MATCH: Pattern Matching

​CREATE: Add Nodes & Edges

​MATCH + CREATE and MATCH + CREATE + RETURN

​SET: Update Properties

​WHERE: Filter nodes and edges by properties

​Edge type filtering

​SKIP and LIMIT

​ORDER BY

​Joins and Cartesian Products

​Property Match Operators

​Boolean operators

​Comparison operators

​Data Types

​RETURN Clause

​Expression evaluation

​LOAD graphs

​Load TuringDB graph

​Load external data into TuringDB graph

​Procedures (CALL)

​DELETE

​Variable-length paths

​Graph algorithms

​Functions

​Aggregate Functions

​Engine Commands

​UNWIND

​Property indexes

​Useful Patterns

​MATCH: Pattern Matching

​CREATE: Add Nodes & Edges

​MATCH + CREATE and MATCH + CREATE + RETURN

​SET: Update Properties

​WHERE: Filter nodes and edges by properties

​Edge type filtering

​SKIP and LIMIT

​ORDER BY

​Joins and Cartesian Products

​Property Match Operators

​Boolean operators

​Comparison operators

​Data Types

​RETURN Clause

​Expression evaluation

​LOAD graphs

​Load TuringDB graph

​Load external data into TuringDB graph

​Procedures (CALL)

​DELETE

​Variable-length paths

​Graph algorithms

​Functions

​Aggregate Functions

​Engine Commands

​UNWIND

​Property indexes

​Useful Patterns

MATCH: Pattern Matching

CREATE: Add Nodes & Edges

MATCH + CREATE and MATCH + CREATE + RETURN

SET: Update Properties

WHERE: Filter nodes and edges by properties

Edge type filtering

SKIP and LIMIT

ORDER BY

Joins and Cartesian Products

Property Match Operators

Boolean operators

Comparison operators

Data Types

RETURN Clause

Expression evaluation

LOAD graphs

Load TuringDB graph

Load external data into TuringDB graph

Procedures (`CALL`)

DELETE

Variable-length paths

Graph algorithms

Functions

Aggregate Functions

Engine Commands

UNWIND

Property indexes

Useful Patterns

MATCH: Pattern Matching

CREATE: Add Nodes & Edges

MATCH + CREATE and MATCH + CREATE + RETURN

SET: Update Properties

WHERE: Filter nodes and edges by properties

Edge type filtering

SKIP and LIMIT

ORDER BY

Joins and Cartesian Products

Property Match Operators

Boolean operators

Comparison operators

Data Types

RETURN Clause

Expression evaluation

LOAD graphs

Load TuringDB graph

Load external data into TuringDB graph

Procedures (`CALL`)

DELETE

Variable-length paths

Graph algorithms

Functions

Aggregate Functions

Engine Commands

UNWIND

Property indexes

Useful Patterns