Question

提前抱歉这个愚蠢的问题，谢谢你的时间！

我有两个问题

查询A

 SELECT sc.name +'.'+ta.name TableName
    ,SUM(pa.rows) RowCnt
FROM sys.tables ta
INNER JOIN sys.partitions pa
ON pa.object_id = ta.object_id
INNER JOIN sys.schemas sc
ON ta.schema_id=sc.schema_id
WHERE ta.is_ms_shipped = 0 AND pa.index_id IN (1,0)
GROUP BY sc.name,ta.name
ORDER BY sum(pa.rows) DESC;

和

查询B

SELECT ta.name TableName
, ta.modify_date ModDate
, ta.max_column_id_used "Columns"
FROM sys.tables ta
ORDER BY ta.name;

执行罚款。

当我添加行

时

, ta.modify_date ModDate
, ta.max_column_id_used "Columns"

我创建查询C

SELECT sc.name +'.'+ta.name TableName
    ,SUM(pa.rows) RowCnt
    , ta.modify_date ModDate
    , ta.max_column_id_used "Columns"
FROM sys.tables ta
INNER JOIN sys.partitions pa
ON pa.object_id = ta.object_id
INNER JOIN sys.schemas sc
ON ta.schema_id=sc.schema_id
WHERE ta.is_ms_shipped = 0 AND pa.index_id IN (1,0)
GROUP BY sc.name,ta.name
ORDER BY sum(pa.rows) DESC;

我收到错误

8120，Level 16，State 1，Line 3 列'sys.tables.modify_date'在选择列表中无效，因为它不包含在聚合函数或GROUP BY子句中。

我理解聚合fx是什么以及GROUP BY的目的。

我是否需要创建子查询以将此信息包含在一个查询中

SQL Server 2012元数据语法

0 个答案: