[英]I want to update values of a null column using the values of other column in SELECT statement
我有一個帶有多個聯接的選擇語句,我在SQL語句中也有一個空白列,我想用另一個也在同一選擇語句中的列的值來更新此NULL列的值。
我嘗試了更新語句,但是沒有用。
SELECT
null as loan_group
,[Loan Number] as loan_number
,[DateofNote] as open_data
,[lnamount] as original_note_amount
,[EOM Balance] as current_principal_balance
,b.status
FROM
tblbordata2 B
INNER JOIN tblLOANDATA2 L ON B.[Student ID] = L.[Student ID]
INNER JOIN tblLoanStatus LS ON LS.[Status ID] = B.Status
INNER JOIN SCHOOLS S ON S.SchoolNumber = b.SchoolNumber
INNER JOIN [School Types] ST ON ST.[School Type ID] = S.SchoolID
loan_group loan_number open_data original_note_amount current_principal_balance status
NULL 1566 1997-10-14 00:00:00.000 6495.00 0.00 6
NULL 1564 1997-10-13 00:00:00.000 6495.00 0.00 4
NULL 1577 1997-10-17 00:00:00.000 2895.00 0.00 9
NULL 1557 1997-10-11 00:00:00.000 2875.00 0.00 6
NULL 1558 1997-10-14 00:00:00.000 3845.00 0.00 19
NULL 1561 1997-10-10 00:00:00.000 1995.00 0.00 19
NULL 1553 1997-10-13 00:00:00.000 3500.00 0.00 6
NULL 1548 1997-10-09 00:00:00.000 3645.00 0.00 19
NULL 1555 1997-10-13 00:00:00.000 2000.00 0.00 4
NULL 1582 1997-10-23 00:00:00.000 4500.00 0.00 19
NULL 1575 1997-10-18 00:00:00.000 3945.00 0.00 4
NULL 1574 1997-10-16 00:00:00.000 4600.00 0.00 19
NULL 1560 1997-10-15 00:00:00.000 3736.00 0.00 4
NULL 1594 1997-10-20 00:00:00.000 2500.00 0.00 6
NULL 1593 1997-10-28 00:00:00.000 3000.00 0.00 4
NULL 1591 1997-10-24 00:00:00.000 3862.00 0.00 6
NULL 1590 1997-10-23 00:00:00.000 6495.00 0.00 6
NULL 1586 1997-10-13 00:00:00.000 3395.00 0.00 6
NULL 1588 1997-10-18 00:00:00.000 3495.00 0.00 4
NULL 1587 1997-10-18 00:00:00.000 3495.00 0.00 6
我想替換第一列借貸組,以便如果狀態為6或4,則為“ R”,否則為“ P”
將CASE與IN子句一起使用
SELECT
case when status IN
('6' , '4' )
then 'R'
else 'P'
end as loan_group
,[Loan Number] as loan_number
,[DateofNote] as open_data
,[lnamount] as original_note_amount
,[EOM Balance] as current_principal_balance
,b.status
FROM
tblbordata2 B
INNER JOIN tblLOANDATA2 L ON B.
[Student ID] = L.[Student ID]
INNER JOIN tblLoanStatus LS ON LS.
[Status ID] = B.Status
INNER JOIN SCHOOLS S ON
S.SchoolNumber = b.SchoolNumber
INNER JOIN [School Types] ST ON ST.
[School Type ID] = S.SchoolID
將其放在您要插入的列的代碼中:
SELECT
case when loan_group is null then
case when status = 6 or status = 4 then 'R'
else 'P'
end
end
,[Loan Number] as loan_number
,[DateofNote] as open_data
,[lnamount] as original_note_amount
,[EOM Balance] as current_principal_balance
,b.status
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