24.4.6 UPDATE Statement
An UPDATE statement modifies data in a table. Its basic form is
UPDATE tableName SET columnName1 = value1, columnName2 = value2, ..., columnNameN = valueN WHERE criteria
where tableName is the table to update. The tableName is followed by keyword SET and a comma-separated list of columnName = value pairs. The optional WHERE clause provides criteria that determine which rows to update. Though not required, the WHERE clause is typically used, unless a change is to be made to every row. The UPDATE statement
UPDATE Authors SET LastName = 'Black' WHERE LastName = 'Red' AND FirstName = 'Sue'
updates a row in the Authors table. The statement indicates that ...
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