mysql - Using JPA1.0: How to write queries -

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good day,

i have weird problem:

this following statement works

query q = em.createquery("select m accountclass m");

whereas following statement not

query q = em.createquery("select m accountclass");

i'm trying write statement allows me use clause;

thank reading this.

em.createquery expects jpql query , not sql query passed parameter.

select m accountclass not valid jpql query, select m accountclass m valid. if wish learn further jpql, can start java ee tutorial chapter on jpql.

the reason why select m accountclass m works in case, because as optional keyword. if wish issue clause, trivial - select m accountclass m m.x= :param1, x attribute of accountclass class , param1 named parameter value has set using query.setparameter method.


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