Paweł Domański
47 lines
956 B
SQL
47 lines
956 B
SQL
-- Find the sequence details:
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select * from pg_sequences;
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(or)
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\ds+
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List of relations
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Schema | Name | Type | Owner | Size | Description
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--------+-----------+----------+--------------+------------+-------------
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public | class_seq | sequence | enterprisedb | 8192 bytes |
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(1 row)
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-- Create sequences:
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postgres# CREATE SEQUENCE class_seq INCREMENT 1 MINVALUE 1 MAXVALUE 1000 START 1;
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CREATE SEQUENCE
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-- Create sequence in descending:
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postgres# CREATE SEQUENCE class_seq INCREMENT -1 MINVALUE 1 MAXVALUE 1000 START 1000;
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CREATE SEQUENCE
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-- Alter sequence to change maxvalue:
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postgres=# alter sequence class_seq maxvalue 500;
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ALTER SEQUENCE
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-- Reset a sequence using alter command:
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postgres=# alter sequence class_seq restart with 1;
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ALTER SEQUENCE
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-- Find next_val and currval of a sequence:
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postgres=# select nextval('class_seq');
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nextval
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---------
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1
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(1 row)
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postgres=# select currval('class_seq');
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currval
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---------
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1
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(1 row) |