sql-添加子查询时出现查询语法问题
如果没有任何语法错误,我似乎无法执行此查询,我得到以下错误: 无法绑定多部分标识符TBL1.Avg_CycleTime 查询:sql-添加子查询时出现查询语法问题,sql,sql-server,subquery,Sql,Sql Server,Subquery,如果没有任何语法错误,我似乎无法执行此查询,我得到以下错误: 无法绑定多部分标识符TBL1.Avg_CycleTime 查询: SELECT (AVG(TBL1.Avg_CycleTime + TBL4.Avg_GRM_CycleTime)) AS Overall_Renewals_CycleTime FROM ( SELECT * FROM ( SELECT AVG(1.00 * Avg_DayDiff) AS Avg_CycleTime FRO
SELECT (AVG(TBL1.Avg_CycleTime + TBL4.Avg_GRM_CycleTime)) AS Overall_Renewals_CycleTime
FROM (
SELECT *
FROM (
SELECT AVG(1.00 * Avg_DayDiff) AS Avg_CycleTime
FROM (
SELECT AVG(1.00 * DATEDIFF(DAY, yy, xx)) AS Avg_DayDiff
FROM Database1.dbo.tbl_1
WHERE month(datecompleted) = month(dateadd(month, - 1, current_timestamp))
AND year(datecompleted) = year(dateadd(month, - 1, current_timestamp))
) t1
WHERE Avg_DayDiff > 0
) TBL1
CROSS JOIN (
SELECT *
FROM (
SELECT AVG(1.00 * Avg_DayDiff) AS Avg_GRM_CycleTime
FROM (
SELECT DATEDIFF(DAY, xx, uu) AS Avg_DayDiff
FROM Database1.dbo.tbl_1
WHERE month(datecompleted) = month(dateadd(month, - 1, current_timestamp))
AND year(datecompleted) = year(dateadd(month, - 1, current_timestamp))
AND ApprovalRequiredFrom = 'GRM'
) t2
WHERE Avg_DayDiff > 0
) TBL2
) TBL3
) TBL4
有人能告诉我我做错了什么吗?我想得到平均周期时间和平均周期时间之间的平均值
干杯,-在select中,您正在从TBL1中选择子查询中不存在的值。将其更改为TBL4
select (AVG(TBL1.Avg_CycleTime + TBL4.Avg_GRM_CycleTime)) as Overall_Renewals_CycleTime
from ()
)TBL4
我也不会使用这么多嵌套选择,或者至少不选择*选择*从来都不是个好主意 -在select中,您正在从TBL1中选择子查询中不存在的值。将其更改为TBL4
select (AVG(TBL1.Avg_CycleTime + TBL4.Avg_GRM_CycleTime)) as Overall_Renewals_CycleTime
from ()
)TBL4
我也不会使用这么多嵌套选择,或者至少不选择*选择*从来都不是个好主意 我建议婴儿步。一次只构建一个步骤,并修复途中遇到的任何错误。从最里面的子查询开始,向外扩展。将TBL1.Avg_CycleTime更改为Avg_CycleTime此神圣地狱嵌套噩梦中的问题是顶行AVGTBL1.Avg_CycleTime+TBL4.Avg_GRM_CycleTime此处没有TBL1。只有一个TBL4。由于查询中只有1个平均周期时间,您不需要使用“Tbl1”限定字段。总之,我建议使用小步骤。一次只构建一个步骤,并修复途中遇到的任何错误。从最里面的子查询开始,向外扩展。将TBL1.Avg_CycleTime更改为Avg_CycleTime此神圣地狱嵌套噩梦中的问题是顶行AVGTBL1.Avg_CycleTime+TBL4.Avg_GRM_CycleTime此处没有TBL1。只有一个TBL4。由于查询中只有1个平均周期时间,您根本不需要使用“Tbl1”限定字段