1.只批量插入: insert into WXPAY_ACCOUNT(id ,out_trade_no ,transaction_id)select SEQ_WXPAY_ACCOUNT.nextval id,a.* FROM ( SELECT#{wxpayAccount.outTradeNo ,jdbcType=VARCHAR},#{wxpayAccount.transactionId ,jdbcType=VARCHAR}FROM dual ) a 2.批量插入(存在不插入) merge int
std::map插入已存在的key时,key对应的内容不会被更新,如果不知道这一点,可能会造成运行结果与预期的不一致 “Because element keys in a map are unique, the insertion operation checks whether each inserted element has a key equivalent to the one of an element already in the container, and if so, the
mybatis oracle mysql 批量插入一.oracle的批量插入方式insert into db(id, zgbh, shbzh) select '1', '2', '3' from dual union all select '2', '3', '4' from dual union all select '3', '4', '5' from dual union all select '4', '5', '6' from dual union all select '5', '6