Merge join not able to join properly on varchar column
0
I've created below code to implement SCD type 2 using merge, when i run the code i'm getting primary key violations on csname field. I have the below values as part of primary key, not sure whether merge SQL does support for varchar or not.
if I run the normal inner join SQL on the same key then i'm getting the matching records as well.
Any help much appreciated
csname
ER - Building Complaints
TR - Building Applications
CREATE PROCEDURE dbo.load_target
AS
BEGIN
INSERT INTO [TR_DW].[enum].[Rt]([csname],[enddatetime],[EffectiveToDate],[EffectiveFromDate],[CurrentRecord])
SELECT[csname],[enddatetime],[EffectiveToDate],[EffectiveFromDate],[CurrentRecord]
FROM
(
MERGE [TR_DW].[enum].[Rt] RtCSQSuTT
USING [TR].[enum].[Rt] RtCSQSuST
ON (RtCSQSuTT.csname = RtCSQSuST.csname)
WHEN NOT MATCHED THEN
INSERT ([csname],[enddatetime],[EffectiveToDate],[EffectiveFromDate],[CurrentRecord])
VALUES ([csname],[enddatetime],'12/31/9999', getdate(), 'Y')
WHEN MATCHED AND RtCSQSuTT.[CurrentRecord] = 'Y' AND
(ISNULL(RtCSQSuTT.[enddatetime], '') != ISNULL(RtCSQSuST.[enddatetime], ''))THEN
UPDATE SET
RtCSQSuTT.[CurrentRecord] = 'N',
RtCSQSuTT.[EffectiveFromDate] = GETDATE() - 1,
RtCSQSuTT.[EffectiveToDate] = GETDATE()
OUTPUT $Action Action_Taken,RtCSQSuST.[csqname],RtCSQSuST.[enddatetime],'12/31/9999' AS[EffectiveToDate],GETDATE() AS[EffectiveFromDate],'Y' AS[CurrentRecord]
)AS MERGE_OUT21
WHERE MERGE_OUT21.Action_Taken = 'UPDATE';
END
GO
tsql
asked Nov 11 at 23:26
NPK
155
add a comment |
0
I've created below code to implement SCD type 2 using merge, when i run the code i'm getting primary key violations on csname field. I have the below values as part of primary key, not sure whether merge SQL does support for varchar or not.
if I run the normal inner join SQL on the same key then i'm getting the matching records as well.
Any help much appreciated
csname
ER - Building Complaints
TR - Building Applications
CREATE PROCEDURE dbo.load_target
AS
BEGIN
INSERT INTO [TR_DW].[enum].[Rt]([csname],[enddatetime],[EffectiveToDate],[EffectiveFromDate],[CurrentRecord])
SELECT[csname],[enddatetime],[EffectiveToDate],[EffectiveFromDate],[CurrentRecord]
FROM
(
MERGE [TR_DW].[enum].[Rt] RtCSQSuTT
USING [TR].[enum].[Rt] RtCSQSuST
ON (RtCSQSuTT.csname = RtCSQSuST.csname)
WHEN NOT MATCHED THEN
INSERT ([csname],[enddatetime],[EffectiveToDate],[EffectiveFromDate],[CurrentRecord])
VALUES ([csname],[enddatetime],'12/31/9999', getdate(), 'Y')
WHEN MATCHED AND RtCSQSuTT.[CurrentRecord] = 'Y' AND
(ISNULL(RtCSQSuTT.[enddatetime], '') != ISNULL(RtCSQSuST.[enddatetime], ''))THEN
UPDATE SET
RtCSQSuTT.[CurrentRecord] = 'N',
RtCSQSuTT.[EffectiveFromDate] = GETDATE() - 1,
RtCSQSuTT.[EffectiveToDate] = GETDATE()
OUTPUT $Action Action_Taken,RtCSQSuST.[csqname],RtCSQSuST.[enddatetime],'12/31/9999' AS[EffectiveToDate],GETDATE() AS[EffectiveFromDate],'Y' AS[CurrentRecord]
)AS MERGE_OUT21
WHERE MERGE_OUT21.Action_Taken = 'UPDATE';
END
GO
tsql
asked Nov 11 at 23:26
NPK
155
It looks to my like you're inserting twice. First within the merge you insert when not matching. Then any result (inserted or updated) is pushed through from theOUTPUTclause and is inserted again for the outside insert. Can you clarify - did you write this code? If so what was the purpose of this? Personally I usually prefer to use seperateINSERTandUPDATEstatements as it is easier to performance tune and debug
– Nick.McDermaid
Nov 11 at 23:45
basically i need to maintain the history (SCD type 2), so first inset for if the record is not exists and if exits expire the existing record and insert the new record from the source
– NPK
Nov 12 at 0:14
First make sure there are no duplicatecsnamein[tr].[enum].[rt]. Also I would be wary of this:ISNULL(RtCSQSuTT.[enddatetime], ''). You're casting dates to strings there - bad idea.
– Nick.McDermaid
Nov 12 at 0:28
Thank you Nick, what's the best way to compare the dates ?
– NPK
Nov 12 at 12:36
Convert it to a legitimate date like 1900-01-01, not a string.
– Nick.McDermaid
Nov 12 at 13:05
add a comment |
0
0
0
I've created below code to implement SCD type 2 using merge, when i run the code i'm getting primary key violations on csname field. I have the below values as part of primary key, not sure whether merge SQL does support for varchar or not.
if I run the normal inner join SQL on the same key then i'm getting the matching records as well.
Any help much appreciated
csname
ER - Building Complaints
TR - Building Applications
CREATE PROCEDURE dbo.load_target
AS
BEGIN
INSERT INTO [TR_DW].[enum].[Rt]([csname],[enddatetime],[EffectiveToDate],[EffectiveFromDate],[CurrentRecord])
SELECT[csname],[enddatetime],[EffectiveToDate],[EffectiveFromDate],[CurrentRecord]
FROM
(
MERGE [TR_DW].[enum].[Rt] RtCSQSuTT
USING [TR].[enum].[Rt] RtCSQSuST
ON (RtCSQSuTT.csname = RtCSQSuST.csname)
WHEN NOT MATCHED THEN
INSERT ([csname],[enddatetime],[EffectiveToDate],[EffectiveFromDate],[CurrentRecord])
VALUES ([csname],[enddatetime],'12/31/9999', getdate(), 'Y')
WHEN MATCHED AND RtCSQSuTT.[CurrentRecord] = 'Y' AND
(ISNULL(RtCSQSuTT.[enddatetime], '') != ISNULL(RtCSQSuST.[enddatetime], ''))THEN
UPDATE SET
RtCSQSuTT.[CurrentRecord] = 'N',
RtCSQSuTT.[EffectiveFromDate] = GETDATE() - 1,
RtCSQSuTT.[EffectiveToDate] = GETDATE()
OUTPUT $Action Action_Taken,RtCSQSuST.[csqname],RtCSQSuST.[enddatetime],'12/31/9999' AS[EffectiveToDate],GETDATE() AS[EffectiveFromDate],'Y' AS[CurrentRecord]
)AS MERGE_OUT21
WHERE MERGE_OUT21.Action_Taken = 'UPDATE';
END
GO
tsql
asked Nov 11 at 23:26
NPK
155
I've created below code to implement SCD type 2 using merge, when i run the code i'm getting primary key violations on csname field. I have the below values as part of primary key, not sure whether merge SQL does support for varchar or not.
if I run the normal inner join SQL on the same key then i'm getting the matching records as well.
Any help much appreciated
csname
ER - Building Complaints
TR - Building Applications
CREATE PROCEDURE dbo.load_target
AS
BEGIN
INSERT INTO [TR_DW].[enum].[Rt]([csname],[enddatetime],[EffectiveToDate],[EffectiveFromDate],[CurrentRecord])
SELECT[csname],[enddatetime],[EffectiveToDate],[EffectiveFromDate],[CurrentRecord]
FROM
(
MERGE [TR_DW].[enum].[Rt] RtCSQSuTT
USING [TR].[enum].[Rt] RtCSQSuST
ON (RtCSQSuTT.csname = RtCSQSuST.csname)
WHEN NOT MATCHED THEN
INSERT ([csname],[enddatetime],[EffectiveToDate],[EffectiveFromDate],[CurrentRecord])
VALUES ([csname],[enddatetime],'12/31/9999', getdate(), 'Y')
WHEN MATCHED AND RtCSQSuTT.[CurrentRecord] = 'Y' AND
(ISNULL(RtCSQSuTT.[enddatetime], '') != ISNULL(RtCSQSuST.[enddatetime], ''))THEN
UPDATE SET
RtCSQSuTT.[CurrentRecord] = 'N',
RtCSQSuTT.[EffectiveFromDate] = GETDATE() - 1,
RtCSQSuTT.[EffectiveToDate] = GETDATE()
OUTPUT $Action Action_Taken,RtCSQSuST.[csqname],RtCSQSuST.[enddatetime],'12/31/9999' AS[EffectiveToDate],GETDATE() AS[EffectiveFromDate],'Y' AS[CurrentRecord]
)AS MERGE_OUT21
WHERE MERGE_OUT21.Action_Taken = 'UPDATE';
END
GO
tsql
tsql
asked Nov 11 at 23:26
NPK
155
asked Nov 11 at 23:26
NPK
155
edited Nov 12 at 0:10
asked Nov 11 at 23:26
NPK
155
asked Nov 11 at 23:26
NPK
155
asked Nov 11 at 23:26
NPK
155
155
It looks to my like you're inserting twice. First within the merge you insert when not matching. Then any result (inserted or updated) is pushed through from theOUTPUTclause and is inserted again for the outside insert. Can you clarify - did you write this code? If so what was the purpose of this? Personally I usually prefer to use seperateINSERTandUPDATEstatements as it is easier to performance tune and debug
– Nick.McDermaid
Nov 11 at 23:45
basically i need to maintain the history (SCD type 2), so first inset for if the record is not exists and if exits expire the existing record and insert the new record from the source
– NPK
Nov 12 at 0:14
First make sure there are no duplicatecsnamein[tr].[enum].[rt]. Also I would be wary of this:ISNULL(RtCSQSuTT.[enddatetime], ''). You're casting dates to strings there - bad idea.
– Nick.McDermaid
Nov 12 at 0:28
Thank you Nick, what's the best way to compare the dates ?
– NPK
Nov 12 at 12:36
Convert it to a legitimate date like 1900-01-01, not a string.
– Nick.McDermaid
Nov 12 at 13:05
add a comment |
It looks to my like you're inserting twice. First within the merge you insert when not matching. Then any result (inserted or updated) is pushed through from theOUTPUTclause and is inserted again for the outside insert. Can you clarify - did you write this code? If so what was the purpose of this? Personally I usually prefer to use seperateINSERTandUPDATEstatements as it is easier to performance tune and debug
– Nick.McDermaid
Nov 11 at 23:45
basically i need to maintain the history (SCD type 2), so first inset for if the record is not exists and if exits expire the existing record and insert the new record from the source
– NPK
Nov 12 at 0:14
First make sure there are no duplicatecsnamein[tr].[enum].[rt]. Also I would be wary of this:ISNULL(RtCSQSuTT.[enddatetime], ''). You're casting dates to strings there - bad idea.
– Nick.McDermaid
Nov 12 at 0:28
Thank you Nick, what's the best way to compare the dates ?
– NPK
Nov 12 at 12:36
Convert it to a legitimate date like 1900-01-01, not a string.
– Nick.McDermaid
Nov 12 at 13:05
It looks to my like you're inserting twice. First within the merge you insert when not matching. Then any result (inserted or updated) is pushed through from the
OUTPUT clause and is inserted again for the outside insert. Can you clarify - did you write this code? If so what was the purpose of this? Personally I usually prefer to use seperate INSERT and UPDATE statements as it is easier to performance tune and debug– Nick.McDermaid
Nov 11 at 23:45
It looks to my like you're inserting twice. First within the merge you insert when not matching. Then any result (inserted or updated) is pushed through from the
OUTPUT clause and is inserted again for the outside insert. Can you clarify - did you write this code? If so what was the purpose of this? Personally I usually prefer to use seperate INSERT and UPDATE statements as it is easier to performance tune and debug– Nick.McDermaid
Nov 11 at 23:45
basically i need to maintain the history (SCD type 2), so first inset for if the record is not exists and if exits expire the existing record and insert the new record from the source
– NPK
Nov 12 at 0:14
basically i need to maintain the history (SCD type 2), so first inset for if the record is not exists and if exits expire the existing record and insert the new record from the source
– NPK
Nov 12 at 0:14
First make sure there are no duplicate
csname in [tr].[enum].[rt]. Also I would be wary of this: ISNULL(RtCSQSuTT.[enddatetime], ''). You're casting dates to strings there - bad idea.– Nick.McDermaid
Nov 12 at 0:28
First make sure there are no duplicate
csname in [tr].[enum].[rt]. Also I would be wary of this: ISNULL(RtCSQSuTT.[enddatetime], ''). You're casting dates to strings there - bad idea.– Nick.McDermaid
Nov 12 at 0:28
Thank you Nick, what's the best way to compare the dates ?
– NPK
Nov 12 at 12:36
Thank you Nick, what's the best way to compare the dates ?
– NPK
Nov 12 at 12:36
Convert it to a legitimate date like 1900-01-01, not a string.
– Nick.McDermaid
Nov 12 at 13:05
Convert it to a legitimate date like 1900-01-01, not a string.
– Nick.McDermaid
Nov 12 at 13:05
add a comment |
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It looks to my like you're inserting twice. First within the merge you insert when not matching. Then any result (inserted or updated) is pushed through from the
OUTPUTclause and is inserted again for the outside insert. Can you clarify - did you write this code? If so what was the purpose of this? Personally I usually prefer to use seperateINSERTandUPDATEstatements as it is easier to performance tune and debug– Nick.McDermaid
Nov 11 at 23:45
basically i need to maintain the history (SCD type 2), so first inset for if the record is not exists and if exits expire the existing record and insert the new record from the source
– NPK
Nov 12 at 0:14
First make sure there are no duplicate
csnamein[tr].[enum].[rt]. Also I would be wary of this:ISNULL(RtCSQSuTT.[enddatetime], ''). You're casting dates to strings there - bad idea.– Nick.McDermaid
Nov 12 at 0:28
Thank you Nick, what's the best way to compare the dates ?
– NPK
Nov 12 at 12:36
Convert it to a legitimate date like 1900-01-01, not a string.
– Nick.McDermaid
Nov 12 at 13:05