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2021-10-11 40754
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2022-01-14 20708
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2020-08-27 14850
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2021-10-25 12590
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2020-09-08 7880
select IFNULL((select cm_id from class_management where cm_name = "训码科技2019软件0班"),0) cm_id
– 本月 SELECT DATE_FORMAT( CURDATE(), ‘%Y-%m-01 00:00:00’) AS ‘本月初’; SELECT DATE_FORMAT( LAST_DAY(CURD