多次指定表名

Question

I am getting the ERROR: "table name 'temp' specified more than once" when trying to perform a join on two tables. Every example I've look at is set out as mine is so what is wrong?

UPDATE info.temp
SET RobberID = info.Robber.RobberID
FROM info.temp
INNER JOIN info.Robber
ON info.temp.NickName = info.Robber.NickName;

Answer 1

Try one of these

UPDATE t1
SET RobberID = info.Robber.RobberID
FROM info.temp as t1
INNER JOIN info.Robber as t2
ON t1.NickName = t2.NickName;

or

UPDATE info.temp
SET RobberID = (select info.Robber.RobberID FROM info.Robber
WHERE info.temp.NickName = info.Robber.NickName)

Answer 2

your are updating info.temp by value form info.temp in wrong way do this way

UPDATE info.temp
SET RobberID =  (select info.Robber.RobberID
FROM info.temp
INNER JOIN info.Robber
ON info.temp.NickName = info.Robber.NickName);