SQL交叉表

之前做货品横向展示时，有看到评论说用到交叉表。 公司最近需要给订单表做一个数据汇总的功能，同事给到一个参考SQL select * from (select COUNT(1) as 已锁定 from tbl_order where orderLock = 1) as A, (select COUNT(1) as 未锁定 from tbl_order where orderLock = 0) as

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