Updating multiple columns in sql La mochaxxx
For multiple-table updates, there is no guarantee that assignments are carried out in any particular order.If you set a column to the value it currently has, My SQL notices this and does not update it.This is a community of tens of thousands of software programmers and website developers including Wrox book authors and readers. By joining today you can post your own programming questions, respond to other developers questions, and eliminate the ads that are displayed to guests. Hii Alll Is it possible to update multiple column based on case statement??employee Table _________________ emp ID First Name Last Name Address 1 N N N 2 N N N 3 N N N Value Table ---------------------- emp ID New VAlue ID 1 'FN' 10 1 'LN' 20 2 'AA' 10 2 'BB' 30 3 'AA1' 10 3 'BB1' 20 3 'cc1' 30 updated employee Table output result should be _________________ emp ID First Name Last Name Address 1 FN LN N 2 AA N BB 3 AA1 BB1 CC1 UPDATE employee Table SET firstname = CASE When(employee Table.first Name='N' and ID=10) THEN Value Table.Hello, I'm trying to update multiple columns with set. It is basically updating couple of columns when the two tables' join condition is met. How do the rows returned from your join equate to the table you are updating? Can someone provide a simple DB2 syntax based on the query I provided?We are going to update column DESCRIPTION and PICTURE in table Categories_Test by using data in table Categories, based on data in the common column CATEGORY_ID. Update data in a column in table A based on a common column in table B. Update data in two columns in table A based on a common column in table B. Conditionally update data in table A based on a common column in table B. No portion may be reproduced without my written permission.The update query below shows that the PICTURE column is updated by looking up the same ID value in CATEGORY_ID column in table Categories_Test and Categories. If you need to update multiple columns simultaneously, use comma to separate each column after the SET keyword. Here we only want to update PICTURE column in Categories_Test table where the data in Category_Name column is Seafood in table Categories. Software and hardware names mentioned on this site are registered trademarks of their respective companies.
(This is because the order in which the rows are updated determines which rows are ignored.) With this change, such statements produce a warning in the log when using statement-based mode and are logged using the row-based format when using mode.Should any right be infringed, it is totally unintentional.Drop me an email and I will promptly and gladly rectify it.Otherwise it would be more of an insert to get one row of data from your updated table with every row from the join condition. You are currently viewing the SQL Language section of the Wrox Programmer to Programmer discussions.