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Just like the SELECT statement, the UPDATE statement executes row-by-row on the table being updated.This means that the SET clause of the UPDATE statement is evaluated once for every row in the updated table.If ' N' is not specified, SQL Server converts the string to the code page that corresponds to the default collation of the database or column.Any characters not found in this code page are lost.

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For more information about CLR user-defined types or alias data types, see CREATE TYPE (Transact-SQL). The value can be a constant or an expression, but it must either match the variable declaration type or be implicitly convertible to that type. The table declaration includes column definitions, names, data types, and constraints.

DEFAULT Specifies that the default value defined for the column is to replace the existing value in the column.

This can also be used to change the column to NULL if the column has no default and is defined to allow null values.

The SELECT clause displays the table before the updates. The FROM clause specifies EMPLOYEES as the table to select from. The UPDATE statement updates the values in EMPLOYEES.

The SET clause specifies that the data in the Salary column be multiplied by 1.04 when the job code ends with a 1 and 1.025 for all other job codes.