SQL Update Command

Use :  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  :

• = - 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  student
set marks = 80

where name = 'Puneet' and
rollno = 13;

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