Question

因为标题说我需要一个查询来查找包含数据库中大多数行的表。

我可以使用此查询显示所有表格：

select * from sys.tables

或者：

select *
from sysobjects
where xtype = 'U'
order by name

此查询的所有索引：

select *
from sys.indexes

但是如何显示整个数据库中包含大多数行的列？

亲切的问候，克里斯

Answer 1

我通常使用此查询按rowcount对所有表进行排序：

USE DATABASENAME
SELECT t.NAME AS TableName, SUM(p.rows) AS RowCounts
FROM sys.tables t
    INNER JOIN sys.indexes i ON t.OBJECT_ID = i.object_id
    INNER JOIN sys.partitions p ON i.object_id = p.OBJECT_ID AND i.index_id = p.index_id
WHERE t.NAME NOT LIKE 'dt%' AND i.OBJECT_ID > 255 AND i.index_id <= 1
GROUP BY t.NAME, i.object_id, i.index_id, i.name
ORDER BY SUM(p.rows) desc

如果您只想在TOP 1

之后添加SELECT

- 回复你的评论----

WHERE 
 t.NAME NOT LIKE 'dt%' AND --exclude Database Diagram tables like dtProperties
 i.OBJECT_ID > 255 AND  --exclude system-level tables
 i.index_id <= 1 -- avoid non clustered index

Answer 2

使用this question的答案，您可以运行以下命令查看行数最多的表：

CREATE TABLE #counts
(
    table_name varchar(255),
    row_count int
)

EXEC sp_MSForEachTable @command1='INSERT #counts (table_name, row_count) SELECT ''?'', COUNT(*) FROM ?'
SELECT TOP 1 table_name, row_count FROM #counts ORDER BY row_count DESC

DROP TABLE #counts

Answer 3

您也可以使用此查询在表名中不重复：

Use[DataBase_Name]
select max(i.rows) as recordCounts,t.name as table_name, 
SCHEMA_NAME(t.schema_id) as schema_name from sysindexes i
inner join sys.tables t
on i.id=object_id
group by t.name, SCHEMA_NAME(t.schema_id)

查找包含数据库中大多数行的表的SQL查询

3 个答案: