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Convert SQL 2008 Query to MySQL 5

Posted on 2009-07-13
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Last Modified: 2012-05-07
I have a SQL server 2008 query that uses the new MERGE statement, and I need to convert it to MySQL 5.  Needless to say, I'm having some problems doing so.  I've looked into the MERGE statement with MySQL, but it seems to be different and not exactly what I'm looking for.  Maybe I'm just not understanding it.  Can anyone help me in converting this or point me in the direction for MySQL 5 equivalent?

Thanks.
MERGE INTO [Movies] As [target]
    USING (SELECT [Dbid], [Status], Studio, Released, Sound, Versions, Price, Rating, [Year], Genre, Aspect, UPC, DVDReleaseDate, [TimeStamp], Name FROM MoviesStaging) AS source
    ON ([target].[Dbid] = source.[Dbid])
    WHEN MATCHED THEN 
        UPDATE SET	Name = source.Name,
			[Dbid] = source.[Dbid],
			[Status] = source.[Status],
			Released = source.Released,
			Sound = source.Sound,
			Versions = source.Versions,
			Price = source.Price,
			Rating = source.Rating,
			[Year] = source.[Year],
			Genre = source.Genre,
			Aspect = source.Aspect,
			UPC = source.UPC,
			DVDReleaseDate = source.DVDReleaseDate,
			[TimeStamp] = source.[TimeStamp]					
	WHEN NOT MATCHED THEN	
	    INSERT ([Dbid], [Status], Studio, Released, Sound, Versions, Price, Rating, [Year], Genre, Aspect, UPC, DVDReleaseDate, [TimeStamp], Name)
	    VALUES (source.[Dbid], source.[Status], source.Studio, source.Released, source.Sound, source.Versions, source.Price, source.Rating, source.[Year], source.Genre, source.Aspect, source.UPC, source.DVDReleaseDate, source.[TimeStamp], source.Name);

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Question by:Phreak3eb
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12 Comments
 
LVL 57

Expert Comment

by:Raja Jegan R
ID: 24840146
MERGE command is not available in MYSQL. You need to update the existing records and Insert the Missing records.

Logic for your conversion:

1. If a record exists, then update those records into Movies table
2. Else Insert those records into Movies table.
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LVL 51

Accepted Solution

by:
Mark Wills earned 1000 total points
ID: 24841706
Agree with rrjegan17... basically becomes a two part process :


    UPDATE Movies SET	Name = source.Name,
			[Dbid] = source.[Dbid],
			[Status] = source.[Status],
			Released = source.Released,
			Sound = source.Sound,
			Versions = source.Versions,
			Price = source.Price,
			Rating = source.Rating,
			[Year] = source.[Year],
			Genre = source.Genre,
			Aspect = source.Aspect,
			UPC = source.UPC,
			DVDReleaseDate = source.DVDReleaseDate,
			[TimeStamp] = source.[TimeStamp]					
    From Movies
    inner join MoviesStaging as source on movies.[Dbid] = source.[Dbid]
 
 
 
    INSERT movies ([Dbid], [Status], Studio, Released, Sound, Versions, Price, Rating, [Year], Genre, Aspect, UPC, DVDReleaseDate, [TimeStamp], Name)
    select source.[Dbid], source.[Status], source.Studio, source.Released, source.Sound, source.Versions, source.Price, source.Rating, source.[Year], source.Genre, source.Aspect, source.UPC, source.DVDReleaseDate, source.[TimeStamp], source.Name
    From MoviesStaging as source
    left outer join Movies on movies.[Dbid] = source.[Dbid]
    where movies.[dbid] is NULL

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Author Comment

by:Phreak3eb
ID: 24844839
I'm clearly an SQL noob.  I'm trying to test the UPDATE statement with no luck.  I got the INSERT statement to work though.  Whenever I run the update statement I get:

ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'From Movies inner join MoviesStaging as source on Movies.Dbid ' at line 16

Here's the slightly modified update statement you gave me.

UPDATE Movies SET
Name = source.Name,
DBID = source.DBID,
Status = source.Status,
ReleaseDate = source.ReleaseDate,
Studio = source.Studio,
Sound = source.Sound,
Versions = source.Versions,
Price = source.Price,
Rating = source.Rating,
Year = source.Year,
Genre = source.Genre,
Aspect = source.Aspect,
UPC = source.UPC,
DVDReleaseDate = source.DVDReleaseDate,
Movies.Timestamp = source.Timestamp
From Movies inner join MoviesStaging as source on Movies.DBID = source.DBID

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LVL 57

Assisted Solution

by:Raja Jegan R
Raja Jegan R earned 1000 total points
ID: 24845057
The above UPDATE statement is of MS SQL syntax. And you need a MySQL Syntax to make it work.

Hope this helps
UPDATE Movies,MoviesStaging
SET
 Movies.Name = MoviesStaging.Name,
 Movies.DBID = MoviesStaging.DBID,
 Movies.Status = MoviesStaging.Status,
 Movies.ReleaseDate = MoviesStaging.ReleaseDate,
 Movies.Studio = MoviesStaging.Studio,
 Movies.Sound = MoviesStaging.Sound,
 Movies.Versions = MoviesStaging.Versions,
 Movies.Price = MoviesStaging.Price,
 Movies.Rating = MoviesStaging.Rating,
 Movies.Year = MoviesStaging.Year,
 Movies.Genre = MoviesStaging.Genre,
 Movies.Aspect = MoviesStaging.Aspect,
 Movies.UPC = MoviesStaging.UPC,
 Movies.DVDReleaseDate = MoviesStaging.DVDReleaseDate,
 Movies.Timestamp = MoviesStaging.Timestamp
Where Movies.DBID = MoviesStaging.DBID

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LVL 51

Expert Comment

by:Mark Wills
ID: 24848257
Ooops, sorry about that... Well caught rrjegan17.
0
 
LVL 57

Expert Comment

by:Raja Jegan R
ID: 24848324
>> Well caught rrjegan17.

It happens..And not a problem
Even I did this mistake earlier and that's why got it this time..

Waiting for Phreak3eb's comment now.
0
 

Author Comment

by:Phreak3eb
ID: 24849332
Thanks guys.  I will try this later today when I'm available and get back to you.
0
 

Author Comment

by:Phreak3eb
ID: 24854523
Ok.  Tried the update and the insert again tonight.  Both "worked", but the insert reported 1 warning, the update reported 18 changes.  Is there a way to get these queries to output that information?  Sorry, I know this question goes a bit off from the original question, but it's kind of part of the overall solution.
0
 
LVL 51

Expert Comment

by:Mark Wills
ID: 24855211
Depends a little bit From procedures or your code, you can use the mysql_affected_rows() function : http://dev.mysql.com/doc/refman/6.0/en/mysql-affected-rows.html

if running within a procedure or interactively can use the row_count() function immediately following your insert or update statement e.g.

Insert table (columns....)
select columns...
from datasource

select row_count()

And this time i checked to make sure I am in the MySQL frame of mind :)
0
 

Author Comment

by:Phreak3eb
ID: 24892007
Thanks for all the help guys.
0
 
LVL 51

Expert Comment

by:Mark Wills
ID: 24892758
No problems, and sorry for that little mind lapse earlier - glad rrjegan17 was there to catch....



0
 
LVL 57

Expert Comment

by:Raja Jegan R
ID: 24892814
Welcome..
And thanks Mark too.
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