MySql several commonly used functions (used at work)

Others 2019-06-26 23:09:22 views: null

1, more time

DATE_FORMAT(mc.create_time,'%Y-%m-%d %H:%i') > DATE_FORMAT(#{voCreateDate},'%Y-%m-%d %H:%i' )

2, IFNULL if empty on return

IFNULL(SUM(mc.gain_medicine_num),0)

3, character splicing

 CONCAT(FORMAT((  (t.totalByMonth) /  (t.totalBuyPeople) * 100),2),'%') AS mouthDuty

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Origin blog.csdn.net/leeue/article/details/93201751

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