postgresqlHow can I use the PostgreSQL nextval function?

The PostgreSQL nextval function can be used to generate a sequence of unique values. It is typically used to create a unique identifier for a row in a table.

Example

CREATE SEQUENCE my_sequence START 1;
SELECT nextval('my_sequence');

Output example

1

The code above creates a sequence called my_sequence starting at 1 and then generates the next value in the sequence.

The code can be modified to set different start values, increments, min/max values, and caching.

Parts of the code:

• CREATE SEQUENCE - Creates a sequence with a given name
• START - Sets the starting value for the sequence
• SELECT nextval - Generates the next value in the sequence

Helpful links

• PostgreSQL Documentation
• PostgreSQL Tutorial

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