mysql查詢所以表，mysql中怎么看主鍵是誰？
mysql查詢主鍵可通過執(zhí)行一條語句進(jìn)行查看：
SELECTcolumn_name
FROM INFORMATION_SCHEMA.`KEY_COLUMN_USAGE`
WHERE
table_name='要查詢主鍵的表名'
AND CONSTRAINT_SCHEMA='數(shù)據(jù)庫'
AND constraint_name='PRIMARY'
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