Upsert-sqlserver2005

我有两张桌子：

NewNotes

MasterNotes

每个月，

NewNotes

表都会更新新账户和现有账户的新账户。我需要更新

MasterNotes

表中的现有注释，或者如果账号尚未在

MasterNotes

表中，则插入新注释

两个表都有三列：

报告

，

账号

，

注释

要更新记录，账号和报告必须相同（MasterNotes的

表可以有两个不同的账号和两个不同的报告）

有人能帮忙吗

到目前为止，我的想法如下：

IF NOT EXISTS
(
SELECT REP, ACCOUNT_NUMBER
FROM MasterNotes
WHERE REP = (SELECT Report FROM NewNotes) AND
      ACCOUNT_NUMBER = (SELECT AccountNo FROM NewNotes)
)
INSERT INTO MasterNotes
ELSE
UPDATE

我知道这是不正确的，因为子查询返回多个值，但我知道如何逐行执行

或者像这样

INSERT INTO MasterNotes
SELECT Report, AccountNo, A.Notes
FROM NewNotes A 
LEFT OUTER JOIN MasterNotes B
    ON A.Report = B.REP AND A.AccountNo = B.ACCOUNT_NUMBER
WHERE B.ACCOUNT_NUMBER IS NULL AND B.REP IS NULL
UPDATE MasterNotes
SET NOTE = B.Notes
FROM MasterNotes A, NewNotes B
WHERE A.ACCOUNT_NUMBER = B.AccountNo AND A.REP = B.Report

这里有一些样品可以让你走。我在SQL2005中提供了两种执行这两种操作的方法。我个人更喜欢JOIN方法，但事实证明它们稍微慢一点——但我发现它们更容易写/读。它们在内部，但被注释掉了

DECLARE @NewNotes TABLE (REPORT VARCHAR(10), ACCOUNT_NUMBER INT, NOTES VARCHAR(50))
DECLARE @MasterNotes TABLE (REPORT VARCHAR(10), ACCOUNT_NUMBER INT, NOTES VARCHAR(50))

INSERT INTO @MasterNotes (REPORT, ACCOUNT_NUMBER, NOTES)
SELECT 'ABC', 123, 'CUSTOMER IS VERY NICE, SOMETIMES...' UNION
SELECT 'DEF', 456, 'CUSTOMER IS ANGRY'

INSERT INTO @NewNotes (REPORT, ACCOUNT_NUMBER, NOTES)
SELECT 'ABC', 123, 'CUSTOMER IS VERY NICE' UNION
SELECT 'DEF', 456, 'CUSTOMER IS ANGRY' UNION
SELECT 'GHI', 789, 'CUSTOMER WANTS CALL BACK'

UPDATE M SET NOTES = N.NOTES
FROM @MasterNotes M, @NewNotes N
WHERE M.REPORT = N.REPORT
AND M.ACCOUNT_NUMBER = N.ACCOUNT_NUMBER

/** ALTERNATE UPDATE METHOD **/
--UPDATE M SET NOTES = N.NOTES
--FROM @MasterNotes M
--JOIN @NewNotes N
--   ON M.REPORT = N.REPORT
--   AND M.ACCOUNT_NUMBER = N.ACCOUNT_NUMBER

INSERT INTO @MasterNotes (REPORT, ACCOUNT_NUMBER, NOTES)
SELECT N.REPORT, N.ACCOUNT_NUMBER, N.NOTES
FROM @NewNotes N
WHERE NOT EXISTS (SELECT ACCOUNT_NUMBER FROM @MasterNotes M WHERE M.REPORT = N.REPORT)  

/** ALTERNATE INSERT METHOD **/
--INSERT INTO @MasterNotes (REPORT, ACCOUNT_NUMBER, NOTES)
--SELECT  N.REPORT, N.ACCOUNT_NUMBER, N.NOTES
--FROM @NewNotes N
--LEFT OUTER JOIN @MasterNotes M 
--   ON N.REPORT = M.REPORT
--   AND N.ACCOUNT_NUMBER = M.ACCOUNT_NUMBER
--WHERE M.ACCOUNT_NUMBER IS NULL   

SELECT *
FROM @MasterNotes

注意：如果您曾经更新到SQL2008+，您可以按如下方式使用
MERGE
功能：

DECLARE @NewNotes TABLE (REPORT VARCHAR(10), ACCOUNT_NUMBER INT, NOTES VARCHAR(50))
DECLARE @MasterNotes TABLE (REPORT VARCHAR(10), ACCOUNT_NUMBER INT, NOTES VARCHAR(50))

INSERT INTO @MasterNotes (REPORT, ACCOUNT_NUMBER, NOTES)
SELECT 'ABC', 123, 'CUSTOMER IS VERY NICE, SOMETIMES...' UNION
SELECT 'DEF', 456, 'CUSTOMER IS ANGRY'

INSERT INTO @NewNotes (REPORT, ACCOUNT_NUMBER, NOTES)
SELECT 'ABC', 123, 'CUSTOMER IS VERY NICE' UNION
SELECT 'DEF', 456, 'CUSTOMER IS ANGRY' UNION
SELECT 'GHI', 789, 'CUSTOMER WANTS CALL BACK'

MERGE INTO @MasterNotes AS DST
USING (SELECT REPORT, ACCOUNT_NUMBER, NOTES FROM @NewNotes) AS SRC
    ON SRC.ACCOUNT_NUMBER = DST.ACCOUNT_NUMBER
WHEN MATCHED THEN UPDATE
    SET DST.REPORT = SRC.REPORT,
        DST.NOTES = SRC.NOTES
WHEN NOT MATCHED THEN 
    INSERT (REPORT, ACCOUNT_NUMBER, NOTES)
    VALUES (SRC.REPORT, SRC.ACCOUNT_NUMBER, SRC.NOTES);

SELECT *
FROM @MasterNotes

让我们看看你到目前为止都做了些什么！我们很乐意为您带来任何麻烦，但“为我编写代码”服务也不例外。。。。这首先需要你自己的努力！