血压正常后可以停药吗:select a(b) from c 这个a(b)是指的什么啊?

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select a(b) from c 这个a(b)是指的什么啊?
这个a(b)不是个字段啊?

sql 用 括号括住的是函数阿。

那么a就是函数，b就是字段或者常量。

从c中选出a(b)

表c中有个字段叫做a(b)，这句话就是从表c中取出这个字段的值

select a(b) from c 这个a(b)是指的什么啊? select * from (select a.*,b.kczwmc kcmc from (select kcdm,max(McjN) Mcj,Max(kcxz) kcxz from (select vary from A to B Bob __ a letter from his sister.A,hear B,heard C,got D,receives The table is made () wood.A.from B.up C.in D.of --Who (A.took the pens and books) B(out) C(from) my bag? How long have you been ____Greener China ? A.with B.at C.from D.through This book was written ___English. A.in B.with C.from D.by |a|+|b-a|-|c-a|-|a+b| One from column A, Two from column B.是什么意思.