UPDATE
{{#set:Related SQL command=INSERT|Related SQL command=DELETE|Related SQL command=SELECT}}
UPDATE is refers to the SQL command UPDATE.
Summary
The UPDATE command is used to update existing records in a table. Syntax may vary between certain types of databases but is generally uniform across multiple vendors.
Syntax
UPDATE <table>
SET <column> = <value> [, <column> = <value>] [, ...]]
[ WHERE <condition> ]
Examples
To update the value from "foo" to "foobar" in column "bar" in table "baz" do the following:
INSERT INTO baz ( bar ) VALUES( "foo" ) UPDATE baz SET bar = "foobar" WHERE bar = "foo"
Note: This will udpdate all the instances where bar has a value of "foo" to "foobar"
Excersises
- Use the sample database and insert and populate it with the data from the [[File::/etc/shadow]].