mysql union出错: "Every derived table must have its own alias"

SELECT count(*) from (SELECT province_code as area_id, count(*) from t_cas_rural_selected GROUP BY province_code

UNION all SELECT city_code as area_id, COUNT(*) from t_cas_rural_selected GROUP BY city_code

UNION all SELECT county_code as area_id, COUNT(*) from t_cas_rural_selected GROUP BY county_code)

as tTotal

如上，后面加个 as tablename 就可以了，例如："as tTotal"

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mysql出现错误“ Every derived table must have its own alias”
Every derived table must have its own alias 这句话的意思是说每个派生出来的表都必须有一个自己的别名一般在多表查询时,会出现此错误. 因为,进行嵌套查询的时 ...
【MySQL】mysql出现错误“ Every derived table must have its own alias”
Every derived table must have its own alias 这句话的意思是说每个派生出来的表都必须有一个自己的别名一般在多表查询时,会出现此错误. 因为,进行嵌套查询的时 ...
Mysql错误：Every derived table must have its own alias
Mysql报错:Every derived table must have its own alias <缺少一个别名> 在子查询中经常会犯的错误 .这个别名其实没啥用途.... ...
MySQL错误:Every derived table must have its own alias
Every derived table must have its own alias 派生表都必须有自己的别名一般在多表查询时,会出现此错误. 因为,进行嵌套查询的时候子查询出来的的结果是作为一个 ...
【mysql报错】[Err] 1248 - Every derived table must have its own alias
当我运行一条联合查询的sql语句时报如下错误: [Err] 1248 - Every derived table must have its own alias,大概意思是每一张派生表必须要有自己的别 ...
mysql—mysql错误Every derived table must have its own alias解决
Every derived table must have its own alias 这句话的意思是说每个派生出来的表都必须有一个自己的别名. 一般在多表查询时,会出现此错误. 因为,进行嵌套查询的 ...
MySql 1248 - Every derived table must have its own alias
执行一个sql语句,报错:1248 - Every derived table must have its own alias 提示说每一个衍生出来的表,必须要有自己的别名执行子查询的时候,外层查询 ...
错误代码： 1248 Every derived table must have its own alias
1.错误描述 1 queries executed, 0 success, 1 errors, 0 warnings 查询:SELECT stu_id, (SELECT stu_name FROM t ...
Every derived table must have its own alias
完整错误信息如下: Every derived table must have its own alias 三月 28, 2017 10:20:46 上午 org.apache.catalina.co ...

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mysql union出错: "Every derived table must have its own alias"

mysql union出错: "Every derived table must have its own alias"的更多相关文章

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