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What is the difference between Statement and PreparedStatement?
Wiki User
∙ 15y ago
* Prepared Statement is Pre-compiled class , but Statement is not. * So in PreparedStatement the execution will be faster. Actually when u submit a simple statement to the databse, at first the DBMS parses it and sends it back with the result, so again when u send the same statement again the DBMS server parses it and sends back the result so here a lot of time is wasted and because the statement is again parsed though it has been sent twice or thrice it consumes a lot of time and response will be slow.Prepared Statement is used when u want to execute a statement object many times. when u submit a PreparedStatement the DBMS server parses it and creates a execution plan. This e-plan can be used when u again send the same statement to the database.That is the DBMS server zest executes the compiled statement rather that executing it from first, hence we get an precompiled statement.And also the advanatge of using this PreparedStatement is it is used to send dynamic sql statements, which u can give values later than giving the values at the time of creation.
Wiki User
∙ 15y ago
Wiki User
∙ 14y agoThe PreparedStatement is a slightly more powerful version of a Statement and should always be at least as quick and easy to handle as a Statement.
The PreparedStatement may be parametrizednull
Most relational databases handles a JDBC / SQL query in four steps:
1.Parse the incoming SQL query
2. Compile the SQL query
3. Plan/optimize the data acquisition path
4. Execute the optimized query / acquire and return data
A Statement will always proceed through the four steps above for each SQL query sent to the database. A PreparedStatement pre-executes steps (1) - (3) in the execution process above. Thus when creating a PreparedStatement some pre-optimization is performed immediately. The effect is to lessen the load on the database engine at execution time.
Another advantage of the PreparedStatement class is the ability to create an incomplete query and supply parameter values at execution time. This type of query is well suited for filtering queries which may differ in parameter value only:
SELECT firstName FROM employees WHERE salary > 50
SELECT firstName FROM employees WHERE salary > 200
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