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In this example, two columns supplier_name and supplier_address is updated by a single statement.
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..........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. To modify a column of a table, you need to specify the column name, table name, and action that you want to perform. column_n: It specifies the columns that you want to update. 3) conditions: It specifies the conditions that must be fulfilled for execution of UPDATE stateme.