SQL Update Command

This command is used to make changes to records in tables. Syntax:

update tablename

set columnname = newvalue [,columnxname = newvaluex...]

where columnname OPERATOR value [and|or columnnamex OPERATOR valuex];

The OPERATOR is one of the conditions listed on the Select Command page.

OPERATORs include:

• = - Equal
• < - Less than
• > - Greater than
• <= - Less than or equal
• >= - Greater than or equal
• <> - Not equal
• LIKE - Allows the wildcard operator, %, to be used to select items that are a partial match. An example is:

select city, state from towntable where state like 'north%'

This allows selection of all towns in states that begin with the word "north" allowing states like North Dakota and North Carolina to be selected.

Example

update citylist

set population = population+1

where name = 'Argos' and

state = 'Indiana';