UPDATE Statements
To modify existing records, use UPDATE statements.
Update Syntax
The UPDATE statement takes as input a comma-separated list of columns and new column values as name-value pairs in the SET clause, as shown in the following example:
UPDATE <table_name> SET { <column_reference> = <expression> } [ , ... ] WHERE { Id = <expression> } [ { AND | OR } ... ]
<expression> ::=
| @ <parameter>
| ?
| <literal>
You can use the executeUpdate method of the Statement or PreparedStatement classes to execute data manipulation commands and retrieve the rows affected, as shown in the following example:
String cmd = "UPDATE Movies SET MovieRating='R' WHERE Id = ?"; PreparedStatement pstmt = connection.prepareStatement(cmd); pstmt.setString(1, "70f6284d2a395396dbb3a60b4ce3d2d6"); int count = pstmt.executeUpdate(); System.out.println(count + " rows were affected"); connection.close();