Incorrect syntax near the keyword 'as'.

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hi all
I have a problem in my sql query
when I use the

(select MsgTable.ID, MAX(MsgTable.Time) as t from MsgTable group by MsgTable.ID)

I get the correct reply
but when I use

(select MsgTable.ID, MAX(MsgTable.Time) as t from MsgTable group by MsgTable.ID) as G

I get following error

Msg 156, Level 15, State 1, Line 12
Incorrect syntax near the keyword 'as'.

I want to use 'G' in a JOIN statement
please help me to figure out this ,

What I have tried:

(select MsgTable.ID, MAX(MsgTable.Time) as t from MsgTable group by MsgTable.ID) As G

Posted 25-Aug-18 19:21pm

saide_a

Updated 25-Aug-18 19:48pm

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OriginalGriff · Accepted Answer · 2018-08-25T19:49:00

Solution 1

Take out "As" after the inner SELECT:

SQL

SELECT a.X, b.Y from MyTable a
JOIN (SELECT ID, x AS Y FROM MyTable) B
ON a.ID = b.ID

Posted 25-Aug-18 19:49pm

OriginalGriff

Comments

saide_a 26-Aug-18 1:58am

its not work for me

OriginalGriff 26-Aug-18 2:04am

"its not work for me" is probably the most useless problem report we get - and we get it a lot. It tells us nothing about what is happening, or when it happens.
So tell us what it is doing that you didn't expect, or not doing that you did.
Tell us what you did to get it to happen.
Tell us any error messages.

Show us exactly what you typed!

saide_a 26-Aug-18 2:13am

what does 'MyTable a' mean? and also B in second line?
I want to get answer from this query
Select D.[ID],D.[UID],D.[Code],D.[Time] From MsgTable AS D
INNER JOIN
(select MsgTable.ID, MAX(MsgTable.Time) from MsgTable group by MsgTable.ID) As G
On D.Time = G.Time AND D.ID = G.ID
Order By D.[ID],D.[Time]

saide_a 26-Aug-18 2:30am

what I tried in your suggested query:
Select D.[ID],D.[UID],D.[Code],D.[Time] From MsgTable D
INNER JOIN
(select MsgTable.ID, MAX(MsgTable.Time) from MsgTable group by MsgTable.ID) G
On D.Time = G.Time AND D.ID = G.ID
Order By D.[ID],D.[Time]
and the error
No column was specified for column 2 of 'G'.

OriginalGriff 26-Aug-18 3:14am

Well yes.
What are you trying to do?
Think about your inputs, and how they relate, and exactly what you want as output. You don't have any column "TIME" in your G results, and you don't use anything from your inner select in your result set!