(1)单纯的insert和insert on duplicate key update 这也是本文最大的特点,查询网上各种阐述Mybatis返回主键的文章,基本只关注insert时Mybatis返回主键的情况,对于插入或更新的sql语句insert on duplicate key update时mybatis返回主键(此时还细分为仅insert,仅update和insert和update混合三种情况)的文章则比较少。 (2)se...
on duplicate KEY UPDATE category_name=t2.category_name,brands=t2.brands</update> mysql因为没有 MERGE INTO USING 这个语法 所以我们采用mysql特有的on duplicate KEY UPDATE来进行数据处理,这样也可以实现saveOrUpdateBatch操作,但是这个有一个限制条件,那就是当前传入参数中必须要有一列是主键或UNIQUE索引否则的...
Failed: Can't execute 'INSERT INTO data (value, count) VALUES ( 'value-020', 1 ) \ ON DUPLICATE KEY UPDATE count=count+1': Unknown command at ./query2.pl line 45. Despite these errors, throughout extensive testing not a single transaction was dropped or executed twice, and the three...
{ER_FOREIGN_DUPLICATE_KEY,"23000","S1009"}, {ER_CANT_CHANGE_TX_ISOLATION,"25001",""}, {ER_WRONG_PARAMCOUNT_TO_NATIVE_FCT,"42000",""}, {ER_WRONG_PARAMETERS_TO_NATIVE_FCT,"42000",""}, {ER_WRONG_PARAMETERS_TO_STORED_FCT,"42000",""}, ...
TK_ON, "TK_ON "}, { TK_USING, "TK_USING "}, { TK_ORDER, "TK_ORDER "}, { TK_GROUP, "TK_GROUP "}, { TK_HAVING, "TK_HAVING "}, { TK_LIMIT, "TK_LIMIT "}, { TK_DELETE, "TK_DELETE "}, { TK_WHERE, "TK_WHERE "}, { TK_UPDATE, "TK_UPDATE "}, { ...
in 等同于多个 on selectename,jobfromempwheresalin(800,5000);-- 注意in后边不是区间,而是具体的值 not in : 不是800和5000的 2.2.4 模糊查询 like 需掌握两个符号: % : 多个字符 _ : 一个字符 比如找出名字里含O的: selectenamefromempwhereenamelike'%O%'; ...