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下面这些SQL语句中“1=1”表示什么意思？select * from vip_purchase_record t1 join tbl_company t2 on t1.cpy_id =t2.cpy_id left join tbl_level t3 on t3.level_id = t1.level_id where 1=1 order by t1.effective_start_time desc ,t1.buy_time desc,
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理解问题下面这些SQL语句中“1=1”表示什么意思？select * from vip_purchase_record t1 join tbl_company t2 on t1.cpy_id =t2.cpy_id left join tbl_level t3 on t3.level_id = t1.level_id where 1=1 order by t1.effective_start_time desc ,t1.buy_time desc,
已完成理解「下面这些SQL语句中“1=1”表示什么意思？select * from vip_purchase_record t1 join tbl_company t2 on t1.cpy_id =t2.cpy_id left join tbl_level t3 on t3.level_id = t1.level_id where 1=1 order by t1.effective_start_time desc ,t1.buy_time desc,」
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下面这些SQL语句中“1=1”表示什么意思？select * from vip_purchase_record t1 join tbl_company t2 on t1.cpy_id =t2.cpy_id left join tbl_level t3 on t3.level_id = t1.level_id where 1=1 order by t1.effective_start_time desc ,t1.buy_time desc,不在提醒