Updating multiple columns in oracle

Posted by / 08-Mar-2020 10:50

Updating multiple columns in oracle

In this example, two columns supplier_name and supplier_address is updated by a single statement.We've been getting a number of questions like this recently. After digging into them for a while, they still seem simple.

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.......... if i know the email_id field is populated on some records but not on others, i can limit the update to just those rows as follows UPDATE PERSONS P SET (jobtitle, last_name, first_name, dblogin_id, email_Id, userlevel, facility_id, supervisor, department, winloginid) = (select jobtitle, last_name, first_name, dblogin_id, email_Id, userlevel, facility_id, supervisor, department, winloginid from TEMP_ECOLAB_PERSONS TE where TE. UPDATE PERSONS P SET (jobtitle, last_name, first_name, dblogin_id, email_Id, userlevel, facility_id, supervisor, department, winloginid) = (select jobtitle, last_name, first_name, dblogin_id, email_Id, userlevel, facility_id, supervisor, department, winloginid from TEMP_ECOLAB_PERSONS TE where TE. PERSON); Note that if there are other rows present in persons that are not in temp_ecolab_persons, these extra rows in the person table will be set to null (or could cause the statement to fail with not null constraint error by the update above so if this is the case, you may also need a where clause on the update statement to restrict these, e.g.2) expression1, expression2, ...expression_n: This specifies the values to assign to the column1, column2, ? This example will update the supplier_name as "Kingfisher" where "supplier_id" is 2.The following example specifies how to update multiple columns in a table.

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DEPARTMENT FROM PERSONS P, TEMP_ECOLAB_PERSONS TE WHERE P.