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2025-04-04 Update From: SLTechnology News&Howtos shulou NAV: SLTechnology News&Howtos > Database >
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Shulou(Shulou.com)06/01 Report--
Create a test table
Create table t1.t (an int,b varchar)
-- add primary key, index
Alter table t1.t add primary key (a)
Alter table t1.t add index ind_t_a (a)
-- Delete primary keys and indexes
Alter table t1.t drop primary key
Alter table t1.t drop index ind_t_a
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