Created
November 18, 2013 12:10
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Khi sử dụng update ... from nếu tham chiếu 2 lần cùng một bản thì có thể sử dụng như sau
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-- sử dụng bản gốc | |
UPDATE TargetTable | |
SET | |
Name = 'XXX' | |
FROM | |
TargetTable parentTable | |
INNER JOIN TargetTable | |
ON | |
parentTable.id = TargetTable.parent_id | |
WHERE | |
parentTable.id = 'xxx' | |
-- sử dụng alias | |
UPDATE childTable | |
SET | |
Name = 'XXX' | |
FROM | |
TargetTable parentTable | |
INNER JOIN TargetTable childTable | |
ON | |
parentTable.id = childTable.parent_id | |
WHERE | |
parentTable.id = 'xxx' |
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