Sql server 将数据类型varchar转换为bigint时出错。更新中
我得到以下错误: 将数据类型varchar转换为bigint时出错 执行以下查询时:Sql server 将数据类型varchar转换为bigint时出错。更新中,sql-server,tsql,sql-update,dynamic-sql,Sql Server,Tsql,Sql Update,Dynamic Sql,我得到以下错误: 将数据类型varchar转换为bigint时出错 执行以下查询时: declare @MaxSizeMB BIGINT set @MaxSizeMB = 50 DECLARE @Query varchar(8000)='' set @Query = 'UPDATE SPMC SET SPMC.HasBlockedSize = 1, SPMC.HasIssues = 1 FROM PWI I
declare @MaxSizeMB BIGINT
set @MaxSizeMB = 50
DECLARE @Query varchar(8000)=''
set @Query = 'UPDATE SPMC
SET SPMC.HasBlockedSize = 1, SPMC.HasIssues = 1
FROM PWI
INNER JOIN SI ON SI.Id = PWI.SourceItemId
INNER JOIN SPMC ON SPMC.SourceItemId = SI.Id
AND SI.ItemSize > ' + CAST(@MaxSizeMB AS bigint) + ' * 1024 * 1024 '
print (@Query)
由于
MaxSizeMB
已经BIGINT
将其转换为BIGINT
将无效,您应该将计算值转换为varchar(max)
由于
MaxSizeMB
已经BIGINT
将其转换为BIGINT
将无效,您应该将计算值转换为varchar(max)
试试这个:
declare @MaxSizeMB BIGINT
set @MaxSizeMB = 50
DECLARE @Query varchar(8000)=''
set @Query=
'Update SPMC
Set SPMC.HasBlockedSize = 1, SPMC.HasIssues = 1
FROM PWI
INNER JOIN SI on SI.Id = PWI.SourceItemId
INNER JOIN SPMC on SPMC.SourceItemId = SI.Id
AND SI.ItemSize > '+ cast(cast(@MaxSizeMB as bigint) as varchar(max)) +' * 1024 * 1024 '
print (@Query)
试试这个:
declare @MaxSizeMB BIGINT
set @MaxSizeMB = 50
DECLARE @Query varchar(8000)=''
set @Query=
'Update SPMC
Set SPMC.HasBlockedSize = 1, SPMC.HasIssues = 1
FROM PWI
INNER JOIN SI on SI.Id = PWI.SourceItemId
INNER JOIN SPMC on SPMC.SourceItemId = SI.Id
AND SI.ItemSize > '+ cast(cast(@MaxSizeMB as bigint) as varchar(max)) +' * 1024 * 1024 '
print (@Query)
要生成动态查询,请将
@MaxSizeMB
强制转换为VARCHAR:
declare @MaxSizeMB BIGINT
set @MaxSizeMB = 50
DECLARE @Query VARCHAR(8000)=''
set @Query=
'Update SPMC
Set SPMC.HasBlockedSize = 1, SPMC.HasIssues = 1
FROM PWI
INNER JOIN SI on SI.Id = PWI.SourceItemId
INNER JOIN SPMC on SPMC.SourceItemId = SI.Id
AND SI.ItemSize > '+ cast(@MaxSizeMB as varchar) +' * 1024 * 1024 '
print (@Query)
要生成动态查询,请将
@MaxSizeMB
强制转换为VARCHAR:
declare @MaxSizeMB BIGINT
set @MaxSizeMB = 50
DECLARE @Query VARCHAR(8000)=''
set @Query=
'Update SPMC
Set SPMC.HasBlockedSize = 1, SPMC.HasIssues = 1
FROM PWI
INNER JOIN SI on SI.Id = PWI.SourceItemId
INNER JOIN SPMC on SPMC.SourceItemId = SI.Id
AND SI.ItemSize > '+ cast(@MaxSizeMB as varchar) +' * 1024 * 1024 '
print (@Query)
如果不从查询中计算
@MaxSizeMB x 1024 x 1024
,只需将结果按如下方式合并到查询中:
declare @MaxSizeMB BIGINT
set @MaxSizeMB = 50*1024*1024
DECLARE @Query varchar(8000)=''
set @Query=
'Update SPMC
Set SPMC.HasBlockedSize = 1, SPMC.HasIssues = 1
FROM PWI
INNER JOIN SI on SI.Id = PWI.SourceItemId
INNER JOIN SPMC on SPMC.SourceItemId = SI.Id
AND SI.ItemSize > '+ cast(@MaxSizeMB as varchar(max))
print (@Query)
您也可以在不使用动态SQL的情况下获得相同的结果。详情如下:
Update SPMC
Set SPMC.HasBlockedSize = 1, SPMC.HasIssues = 1
FROM PWI
INNER JOIN SI on SI.Id = PWI.SourceItemId
INNER JOIN SPMC on SPMC.SourceItemId = SI.Id
AND SI.ItemSize > (@MaxSizeMB *1024*1024)
如果不从查询中计算
@MaxSizeMB x 1024 x 1024
,只需将结果按如下方式合并到查询中:
declare @MaxSizeMB BIGINT
set @MaxSizeMB = 50*1024*1024
DECLARE @Query varchar(8000)=''
set @Query=
'Update SPMC
Set SPMC.HasBlockedSize = 1, SPMC.HasIssues = 1
FROM PWI
INNER JOIN SI on SI.Id = PWI.SourceItemId
INNER JOIN SPMC on SPMC.SourceItemId = SI.Id
AND SI.ItemSize > '+ cast(@MaxSizeMB as varchar(max))
print (@Query)
您也可以在不使用动态SQL的情况下获得相同的结果。详情如下:
Update SPMC
Set SPMC.HasBlockedSize = 1, SPMC.HasIssues = 1
FROM PWI
INNER JOIN SI on SI.Id = PWI.SourceItemId
INNER JOIN SPMC on SPMC.SourceItemId = SI.Id
AND SI.ItemSize > (@MaxSizeMB *1024*1024)
为什么要创建查询字符串而不是在实际查询中使用变量?为什么要创建查询字符串而不是在实际查询中使用变量?