使用'from'子句中的多个表在MySQL查询中添加'count'

Question

我有以下MySQL查询：

select * from u, s, c, ut, m 

工作正常，显示所有表的所有列。我想仅将记录计数添加到u表。

我试过了：

select (select count(*) as totalcount from u), * from u, s, c, ut, m 

但它正在抛出错误。

Answer 1

此查询对我有用：

select * , (select count(*) from u) as totalcount from u , s , c , ut , m ;  

Answer 2

SELECT t1.*, (SELECT COUNT(*) FROM table t3) AS TotalCount FROM table_Name1 t1, tableName t;

这可能会对你有所帮助。 指定要从中检索的表的列。如果你希望所有列更好的方法是join表。

Answer 3

select (select count(*) as totalcount from u), * from u, s, c, ut, m 

我尝试你的查询，它工作正常。试试吧。我希望它有效。

select (select count(*) from u) as totalcount, * from u, s, c, ut, m