SQL field splicing

News 2023-08-11 20:57:53 views: null

SQL splicing two fields to get the mobile phone number

LEFT(CONCAT_WS("",f.contacttel,s.phone),11)

SQL splicing two fields

CONCAT_WS("",c.id_card,f.certid)

The SQL splicing field takes the first one that is not empty

COALESCE(f.username,c.username)

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Origin blog.csdn.net/qq_41941497/article/details/127361310

SQL field splicing

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