- Mysql insert on duplicate key update update#
- Mysql insert on duplicate key update code#
- Mysql insert on duplicate key update plus#
The next step is to insert the data into the table. The first step is to create a table named “employee” using the following statement: CREATE TABLE employee ( emp_ID int AUTO_INCREMENT PRIMARY KEY, Name varchar(45) DEFAULT NULL, Email varchar(45) DEFAULT NULL, County varchar(25) DEFAULT NULL )
Mysql insert on duplicate key update update#
On the other hand, if we use the ON DUPLICATE KEY UPDATE clause in a SQL statement, it will update the old row with the new row values, regardless of whether the row has a unique or primary key column. In other words, if we insert new values into the table and it causes a duplicate row in a UNIQUE OR PRIMARY KEY column, we will receive an error message. A row that would cause a duplicate error value in a UNIQUE or PRIMARY KEY index column will be updated when we specify the ON DUPLICATE KEY UPDATE clause in a SQL statement. * This is the real update here.In MySQL, the Insert on Duplicate Key Update statement extends the INSERT statement. NOTE: PROCEDURE SQL used (Totalprocess time):Ģ TheSAS System 06:41 Thursday,January 12, 2012 NOTE: The SAS System stoppedprocessing this step because of errors. NOTE: PROC SQL set option NOEXECand will continue to check the syntax of statements. NOTE: WritingTAGSETS.SASREPORT12(EGSR) Body file: EGSRġ6 UPDATE condary1 (a.id, name,code, status)ĮRROR 76-322: Syntax error, statementwill be ignored. This is a simple query, I have lot more and complex which Ican’t post but I think you get the idea.ġ2 ODS tagsets.sasreport12(ID=EGSR)FILE=EGSR STYLE=Analysisġ2 !STYLESHEET=(URL="file:///C:/sas93/software/x86/SASEnterpriseGuide/4.3/Styles/Analysis.css")ġ2 ! NOGTITLE NOGFOOTNOTE GPATH=&sasworklocation ENCODING=UTF8options(rolap="on") UPDATE secondary1 (a.id, name, code, status) I now want toUPDATE table condary1 again as the status changes to ‘0’ for which I’mtrying UPDATE clause instead INSERT with different combinations of SELECT INSERT INTO condary1 (a.id, name, code, status)
In (a), I meant I need to UPDATE older record with new one if KEY is same.īelow text should help you get the problem better. My approach is to start simple - use easiest tool (EG for example) - and then only complicate enough to get needed efficiency. The best solution balances machine effeciency against those other concerns.
Mysql insert on duplicate key update code#
Keep in mind that as you perform additional optimizations, that you are generally making your code more complex and less maintainable as well as using coder time to gain processing efficiencies. This step could include the pass-thru code to which Doc refers. EG generates generic code based upon your directions and there is always the possibility that with knowledge of your database and the data, you can optimize better than it can in a specific solution. Then if it is not efficient enough from processing standpoint, then look at modifying the EG generated code to make more efficient. I can make some guesses about issue but would be best if you can provide samples of sql and error message? Also can you provide proc contents on the table you are trying to update? Also some sample records from the UPDATE input would be useful.īuilding on Doc's response to (b), I would start with EG.
I am confused with regards to (a) your title says help with UPDATING unique key, but text referes to difficulties with UPDATING with duplicate records, which implies non-unique keys. Second Method: Here, I use explicit updating. * two step process which deletes records from target table with * code to simulate primary1 and secondary1 tablesĬreate table work.primary1 (id char(4) primary keyįirst Method: Here I show the first method which is to delete records to be updated and then Setup code: This section of code sets up some tables to mimic your tables. Performance can be dependent upon the both SAS optimization and DB optimization. Note that if you can update the complete record, then you may want to benchmark both methods to see which performs best. I might be missing something here but I tried several variations before getting this to work.
Mysql insert on duplicate key update plus#
Some versions will allow you to write the update referencing the source table only once, but I found that I had to reference the source table once for each column being updated plus again for the update overall. The code that I present below is more complicated than what might be needed with other versions of SQL. The second method uses Proc SQL update functionality and will give you the flexibility to update only a subset of columns if you wish.
So it deletes the records to be updated and then inserts the new record. The first method assumes you can always update the complete record in your secondary table. I have a couple of techniques which may work for you.
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