不使用索引，添加数据，插入数据时防止重复

mybatis 代码     觉得不错就点赞哦！！！

<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>

关键代码

INSERT IGNORE INTO  表名('字段') 

SELECT '字段需要插入时的数据' FROM dual 

WHERE NOT EXISTS

(SELECT * FROM '表名' WHERE '需要被限制不重复的字段' = '被限制字段本次插入的数据')

关键词

IGNORE

NOT EXISTS

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