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33 lines
893 B
Plaintext
33 lines
893 B
Plaintext
-- Create a new table or a temporary table
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CREATE [TEMP] TABLE [IF NOT EXISTS] table_name(
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pk SERIAL PRIMARY KEY,
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c1 type(size) NOT NULL,
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c2 type(size) NULL,
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...
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);
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-- Add a new column into a table
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ALTER TABLE table_name ADD COLUMN new_column_name TYPE;
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-- Drop a column in a table
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ALTER TABLE table_name DROP COLUMN column_name;
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-- Rename a column
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ALTER TABLE table_name RENAME column_name TO new_column_name;
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-- Set or remove a default value for a column
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ALTER TABLE table_name ALTER COLUMN [SET DEFAULT value | DROP DEFAULT]
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-- Add a primary key to a table
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ALTER TABLE table_name ADD PRIMARY KEY (column,...);
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-- Remove the primary key from a table
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ALTER TABLE table_name
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DROP CONSTRAINT primary_key_constraint_name;
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-- Rename a table
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ALTER TABLE table_name RENAME TO new_table_name;
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-- Drop a table and its dependent objects:
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DROP TABLE [IF EXISTS] table_name CASCADE;
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