Updating multiple fields in sql
When SET ANSI_PADDING OFF then CHAR data types are padded with spaces, VARCHAR data types have trailing spaces removed, and VARBINARY have trailing zeros removed.
For instance, if a field is defined as CHAR(10) and you update the value ‘Kris’ into this column, then it will be padded with six spaces.
The value is changed to ‘Kris ‘You can handle errors when executing an UPDATE statement using a TRY…CATCH construct.
There are several common reason an UPDATE statement may fail.
The UPDATE statement is complex and there are many elements to consider. For a full list check out the UPDATE (Transact-SQL) article.
Keep in mind that when updating data in columns whose data type is CHAR, VARCHAR, or VARBINARY, the padding or truncation of data depends upon the SET ANSI_PADDING setting.
Question: I want to update multiple rows in my table, and I need to understand how to update multiple columns.
I already know how to update multiple rows using my where clause, but I don't see how to update multiple columns.
We discuss some best practices, limitations, and wrap-up with several examples.
There are three components to an UPDATE statement: Note: The Sales Person ID generated for your table’s rows may be different than what is show in the exercises, since this primary key is auto generated.
The UPDATE statement is capable of updating more than one row. All rows returned via the WHERE clause criteria are updated.
Visit Stack Exchange Database Administrators Stack Exchange is a question and answer site for database professionals who wish to improve their database skills and learn from others in the community. Sign up to join this community CREATE TABLE one ( record_id SERIAL, one_first_var INTEGER, one_second_var INTEGER, one_third_var INTEGER ); INSERT INTO one (one_first_var, one_second_var, one_third_var) VALUES (1, 1, 1); INSERT INTO one (one_first_var, one_second_var, one_third_var) VALUES (2, 2, 2); INSERT INTO one (one_first_var, one_second_var, one_third_var) VALUES (3, 3, 3); CREATE TABLE two ( record_id SERIAL, two_first_var INTEGER, two_second_var INTEGER, two_third_var INTEGER ); INSERT INTO two (two_first_var, two_second_var, two_third_var) VALUES (21, 21, 21); INSERT INTO two (two_first_var, two_second_var, two_third_var) VALUES (22, 22, 22); INSERT INTO two (two_first_var, two_second_var, two_third_var) VALUES (23, 23, 23); WITH my_values AS ( SELECT one_first_var, one_second_var, one_third_var FROM one WHERE one_first_var = 2 ) UPDATE two SET two_first_var = my_values.one_first_var, two_second_var = my_values.one_second_var, two_third_var = my_values.one_third_var FROM my_values WHERE two_second_var = 22; UPDATE tgt SET Column1 = src.
Target Table AS tgt INNER JOIN ( VALUES (1, 'a', 'k', 'x', ...), (2, 'b', 'l', 'y', ...), (3, 'c', 'm', 'z', ...) ) AS src (ID, Column1, Column2, Column3, ...) ON tgt.