SQL简单嵌套选择查询被阻止
在系统中,我使用下面的查询来获取表的一部分数据,以便实现分页。该表目前只包含大约100条记录,但稍后将增加到100多万条记录SQL简单嵌套选择查询被阻止,sql,sql-server,pagination,sqltransaction,Sql,Sql Server,Pagination,Sqltransaction,在系统中,我使用下面的查询来获取表的一部分数据,以便实现分页。该表目前只包含大约100条记录,但稍后将增加到100多万条记录 SELECT Id AS ActualMapping_Id, BudgetPhase AS ActualMapping_BudgetPhase, FromBH AS ActualMapping_FromBH, ToBH AS ActualMapping_ToBH, FromBI AS ActualMapping_FromBI,
SELECT
Id AS ActualMapping_Id,
BudgetPhase AS ActualMapping_BudgetPhase,
FromBH AS ActualMapping_FromBH,
ToBH AS ActualMapping_ToBH,
FromBI AS ActualMapping_FromBI,
ToBI AS ActualMapping_ToBI,
FromSI1 AS ActualMapping_FromSI1,
ToSI1 AS ActualMapping_ToSI2,
FromSI2 AS ActualMapping_FromSI2,
ToSI2 AS ActualMapping_ToSI2,
DataType AS ActualMapping_DataType,
Status AS ActualMapping_Status,
MappingType AS ActualMapping_MappingType,
LastMappedBy AS ActualMapping_LastMappedBy,
LastMappedDate AS ActualMapping_LastMappedDate
FROM
(
SELECT
Id,
BudgetPhase,
FromBH,
ToBH,
FromBI,
ToBI,
FromSI1,
ToSI1,
FromSI2,
ToSI2,
DataType,
Status,
MappingType,
LastMappedBy,
LastMappedDate,
ROW_NUMBER() OVER (ORDER BY FromBH) AS RowNumber
FROM
ActualMapping
WHERE
DataType = 'Cost' and
Status = 'Active' and
MappingType = 'Static' and
BudgetPhase like '%some_text%' and
ToBH like '%some_text%' and
ToBI like '%some_text%' and
ToSI1 like '%some_text%' and
ToSI2 like '%some_text%' and
FromBH like '%some_text%' and
FROMBI like '%some_text%' and
FROMSI1 like '%some_text%' and
FROMSI2 like '%$some_text%'
) AS NumberedTable
WHERE
RowNumber BETWEEN 1 AND 50
上面的查询工作得很好(至少在大约100条记录上),但过了一段时间它开始被阻塞。我无法理解它被阻塞的可能原因,但当这种情况发生时,我将无法从表中执行简单的select查询,除非我杀死所有堆积起来的阻塞查询
因此,我的问题是:
双<代码> %%查询需要一个表扫描-您可能需要考虑全文索引:该表的索引状态是什么?运行查询时,表上是否有任何insert、update、delete操作?@cqi没有其他查询同时运行。只有嵌套的选择双代码> %%查询需要一个表扫描-您可能需要考虑全文索引。运行查询时,表上是否有任何insert、update、delete操作?@cqi没有其他查询同时运行。只需选择嵌套的