SQL查询复制值 - 初学者

Question

INSERT INTO Odds_display (Team, Odds)
SELECT DISTINCT Team1, Odds1
FROM Odds
WHERE Team1 = 'Team SoloMid'
AND NOT EXISTS (SELECT Team FROM Odds_display)

所以，我不知道我是盲目还是愚蠢...或者两者兼而有之！ SQL的初学者，但我的目标是从表中复制2个值并将它们插入到另一个表中，但不要插入任何重复项！

所以表格Odds是"original"表，我想复制到Odds_display表并防止重复！

Answer 1

您的子查询中需要WHERE子句来告诉您哪个团队不想创建

副本

INSERT INTO Odds_display (Team, Odds)
SELECT DISTINCT Team1, Odds1
FROM Odds
WHERE Team1 = 'Team SoloMid'
AND NOT EXISTS (SELECT * FROM Odds_display WHERE Team = 'Team SoloMid')

Answer 2

尝试将NOT EXISTS更改为NOT IN，如下所示

INSERT INTO Odds_display (Team, Odds)
SELECT DISTINCT Team1, Odds1
FROM Odds
WHERE Team1 = 'Team SoloMid'
AND Team1 NOT IN (SELECT Team FROM Odds_display)