对SQL COUNT（）查询使用AND操作

Question

Is it possible to use the AND operator in an SQL COUNT() query? For example:

SELECT COUNT(field1) AS count FROM table WHERE field1='value1' AND field2=value2'

Right now I'm getting a syntax error with that query. Any advice?

Answer 1

Yes:

SELECT COUNT(*) AS count
FROM table 
WHERE field1='value1' 
AND field2='value2'; -- btw, you were missing the leading quote from value2

Answer 2

您会收到语法错误，因为在value2之前省略了引号。

Answer 3

我来看看“ Read”这个词，似乎是保留的。