将数据从2列复制到另一个表中的1列MS SQL

Question

我试图复制存储在比赛的获奖者tblFixtures中的一列tblEntrants 。 因此，我基本上希望这样的赢家列表在tblEntrants AccountID列中创建...

tblFixtures Columns: Player1 resultPLayer1 Player2 ResultPlayer2, CompID
                       john        5         stu         2        (Guid) 
                       dave        0         max         5        (Guid)

tblEntrants Columns: AccountID, CompID
                        john    (Guid)
                        dave    (Guid)

到目前为止，这是我尝试过的方法，但是没有用。

INSERT INTO tblEntrants(AccountID,compID) SELECT(CASE WHEN (SELECT resultplayer1 FROM tblfixtures) > (SELECT resultplayer2 FROM tblfixtures) THEN (SELECT player1 FROM tblfixtures) END), @compID

INSERT INTO tblEntrants(AccountID,compID) SELECT(CASE WHEN (SELECT resultplayer2 FROM tblfixtures) > (SELECT resultplayer2 FROM tblfixtures) THEN (SELECT player2 FROM tblfixtures) END), @compID

Answer 1

尝试：您可以在CASE使用单个SELECT语句来完成此操作

INSERT INTO tblEntrants(AccountID,compID)
SELECT
    CASE WHEN resultPLayer1 > ResultPlayer2 THEN player1 ELSE player2 END, @compID
FROM tblFixtures

Answer 2

您可以使用它。

INSERT INTO tblEntrants(AccountID,compID) 
SELECT CASE WHEN ResultPlayer2 > resultPLayer1 THEN Player2 ELSE Player1 END, CompID
FROM tblfixtures