Updating multiple columns in oracle

After each exercise, we provide the solution so you can check your answer. The Oracle UPDATE statement is used to update existing records in a table in an Oracle database.Hi Everyone how should i update multiple columns of a table from another table...Suppose I have table A and B and having four columns each table A(col1,col2,col3,col4) B(col1,col2,col3,col4) then how should i do something like this update A set(col2,col4)=(select B.col2, B.col4 from B where B.col1=A.col1 and A.col3=A.col3) Please help.......... Because it has attracted low-quality or spam answers that had to be removed, posting an answer now requires 10 reputation on this site (the association bonus does not count).UPDATE summary_data SET current_category = (SELECT category_id FROM products WHERE products.product_id = summary_data.product_id) WHERE EXISTS (SELECT category_id FROM products WHERE products.product_id = summary_data.product_id); If you want to test your skills using the SQL UPDATE statement, try some of our practice exercises. So, please make sure you make the necessary changes before running the script. " clause to the above SQL in case you need to insert new records, if it does not exist.

We've been getting a number of questions like this recently. After digging into them for a while, they still seem simple. DEPARTMENT FROM PERSONS P, TEMP_ECOLAB_PERSONS TE WHERE P. DEPARTMENT; MERGE INTO PERSONS_TMP PT USING ( SELECT P. You may wish to update records in one table based on values in another table.Since you can't list more than one table in the Oracle UPDATE statement, you can use the Oracle EXISTS clause.

Leave a Reply