Question

Specifically if I have three queries should I do

PreparedStatement singleQuery ...

and “share” the one object. Or should I do

PreparedStatement query1 ...
PreparedStatement query2 ...
PreparedStatement query3 ...

Answer 1

It depends on how different the three queries are. If they are the same query but with different arguments then use a single PreparedStatement and set the arguments each time. If they are essentially three different queries (e.g. a select followed by an update) then you’ll need three different PreparedStatements.

For example, if the SQL for all three is of the form SELECT * FROM table WHERE id = something then a single statement is fine.

If the first query is SELECT name FROM customers WHERE id = ? and the second is SELECT price FROM products WHERE id = ? then you’re gonna need different objects.