change primary key sql
ALTER TABLE <Table_Name> DROP CONSTRAINT <constraint_name> ALTER TABLE <Table_Name> ADD CONSTRAINT <constraint_name> PRIMARY KEY (<Column1>,<Column2>)
change primary key sql
ALTER TABLE <Table_Name> DROP CONSTRAINT <constraint_name> ALTER TABLE <Table_Name> ADD CONSTRAINT <constraint_name> PRIMARY KEY (<Column1>,<Column2>)
sql primary key
-- NOTE: this is for SQL-Oracle specifically -- example: SELECT cols.table_name, cols.column_name, cols.position, cons.status, cons.owner FROM all_constraints cons, all_cons_columns cols WHERE cols.table_name = 'CUSTOMERS' AND cons.constraint_type = 'P' AND cons.constraint_name = cols.constraint_name AND cons.owner = cols.owner; -- syntax: SELECT cols.table_name, cols.column_name, cols.position, cons.status, cons.owner FROM all_constraints cons, all_cons_columns cols WHERE cols.table_name = '<table-name>' -- Replace <table-name> with your table-name AND cons.constraint_type = 'P' AND cons.constraint_name = cols.constraint_name AND cons.owner = cols.owner;
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