Mysql語句注意事項

一、Mysql對NULL值的處理正則表達式 IS NULL、IS NOT NULL、<=>sql SELECT * FROM runoob_test_tbl WHERE runoob_count IS NULL; maven 二、正則表達式查詢》》》》類似於模糊查詢likeide 查找name字段中以'st'爲開頭的全部數據：spa SELECT name FROM person_tbl WHER

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