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SQL Statement and prepared statement
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Posted in : JDBC

What is Statement and prepared statement in SQL

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February 24, 2008 at 5:42 PM


Statement and prepared statement are the interfaces declared in JAVA.SQL.

While you connecting to a database these are required.

If you use statement interface you must give input values to be inserted in the program itself. We can't change change the values after compilation. To create a statement: Statement stmt = conn.createStatement();

In case of PreparedStatement only we have to generate a query inside the program. This query will be compiled when the program is being compiled. And the input for the values will be inserted at runtime using setXXX(); method . This method has two arguements. they are first one: Arguement sequence number, secon one : corresponding for its argument.

To create a preparedstatement PreparedStatement ps = conn.prepareStatement( "SELECT i., j. FROM Omega i, Zappa j" + "WHERE i = ? AND j = ?" );

Examples:

Data type Corresponding methods
---------- -------------------- 
CHAR setString() 
VARCHAR2 setString() 
NUMBER setBigDecimal() 
setBoolean() 
setByte() 
setShort() 
setInt() 
setLong() 
setFloat() 
setDouble() 









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