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看到 * 这个字符的时候,是不是大家觉得是读取记录中的所有字段值? 对于 selete *这条语句来说是这个意思,但是在 count(*) 中并不是这个意思。
看到 * 这个字符的时候,是不是大家觉得是读取记录中的所有字段值?
对于 selete *这条语句来说是这个意思,但是在 count(*) 中并不是这个意思。
selete *
count(*)
selete *应该为select *
select *
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selete *
应该为select *
The text was updated successfully, but these errors were encountered: