mybatis 程式碼     覺得不錯就點贊哦！！！

<!--防止插入重複資料，採用插入判斷-->
<insert id="insertVariant" parameterType="com.wwx.datasynchronizer.entity.mingnew.VariantBean">
    INSERT IGNORE INTO  equipmentseries(equipId,name) SELECT #{id},#{name} FROM dual WHERE NOT EXISTS(SELECT * FROM equipmentseries WHERE equipId 
 
= #{id})
</insert>

關鍵程式碼

INSERT IGNORE INTO  表名('欄位') 

SELECT '欄位需要插入時的資料' FROM dual 

WHERE NOT EXISTS

(SELECT * FROM '表名' WHERE '需要被限制不重複的欄位'= '被限制欄位本次插入的資料')

關鍵詞

IGNORE

NOT EXISTS

覺得不錯就點贊哦！！！