ALTER TABLE "dba"."ovt_emp" DELETE DELETE PRIMARY KEY;
ALTER TABLE "dba"."ovt_emp" ADD PRIMARY KEY("ocb_emp_id","ocb_month")
Query diatas adalah utk menghapus dan membuat primary key di suatu
table,
1. bagaimana query utk menghapus INDEX
2. bagaimana query utk membuat INDEX
thanks
Yazid
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