SQL Update

The SQL UPDATE statement allows you to update an existing record in the database.

The UPDATE command uses a WHERE clause. If you don’t use a WHERE clause, all rows will be updated. In fact, the syntax for a basic UPDATE statement is very similar to a SELECT statement.

SQL statement

UPDATE Individual
SET UserName = 'funnyman'
WHERE IndividualId = '6'
 

Source Table

IndividualId FirstName LastName UserName
1 Fred Flinstone freddo
2 Homer Simpson homey
3 Homer Brown notsofamous
4 Ozzy Ozzbourne sabbath
5 Homer Gain noplacelike
6 Benny Hill hillbenny

Result

Now if we select this record, we can see the updated value.

IndividualId FirstName LastName UserName
6 Benny Hill funnyman

Updating Multiple Fields

To update multiple fields, separate each field assignment with a comma.

SQL statement

UPDATE Individual
SET UserName = 'getserious', FirstName = 'Onetree'
WHERE IndividualId = '6'
 

Result

IndividualId FirstName LastName UserName
6 Onetree Hill getserious
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