Updating Records

The update statement is used to update or change records that match a specified criteria. This is accomplished by carefully constructing a where clause.

update "tablename"
set "columnname" =
"newvalue"
[,"nextcolumn" =
"newvalue2"...]
where "columnname"
OPERATOR "value"
[and|or "column"
OPERATOR "value"];

[] = optional

[The above example was line wrapped for better viewing on this Web page.]

Examples:

update phone_book
set area_code = 623
where prefix = 979;

update phone_book
set last_name = 'Smith', prefix=555, suffix=9292
where last_name = 'Jones';

update employee
set age = age+1
where first_name='Mary' and last_name='Williams';

Update statement exercises

After each update, issue a select statement to verify your changes.

  1. Jonie Weber just got married to Bob Williams. She has requested that her last name be updated to Weber-Williams.

    Show Answer

  2. Dirk Smith’s birthday is today, add 1 to his age.

    Show Answer

  3. All secretaries are now called “Administrative Assistant”. Update all titles accordingly.

    Show Answer

  4. Everyone that’s making under 30000 are to receive a 3500 a year raise.

    Show Answer

  5. Everyone that’s making over 33500 are to receive a 4500 a year raise.

    Show Answer

  6. All “Programmer II” titles are now promoted to “Programmer III”.

    Show Answer

  7. All “Programmer” titles are now promoted to “Programmer II”.

    Show Answer

Create at least 5 of your own update statements and submit them.

 

Enter SQL Statement here:

Results will be displayed here

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