I want to execute sql query like so:
statement.execute("select fullName from user where user_id=1; select fullName from user where user_id=2");
This is possible only when you have set one database connection property to allow multiple queries to execute all at once. And the property name is allowMultiQueries=true. This property has to be set and send along with a database connection request to the server. General syntax is like this:
String dbUrl = "jdbc:mysql:///test?allowMultiQueries=true";
This is additional connection property to those if already exists some, like autoReConnect=true, etc.
Acceptable values for allowMultiQueries property are true, false, yes, and no. Any other value is rejected at runtime with an SQLException.
You have to use execute( String sql ) or its other variants to fetch results of the query execution.
multiQuerySqlString = "select fullName from user where user_id=1; ";
multiQuerySqlString += "select fullName from user where user_id=2; ";
// you can multiple types of result sets
multiQuerySqlString += "select last_login from user_logs where user_id=1; ";
boolean hasMoreResultSets = stmt.execute( multiQuerySqlString );
To iterate through and process results you require following steps:
int rsNumber = 0;
while ( hasMoreResultSets ) {
rsNumber += 1;
Resultset rs = stmt.getResultSet();
// based on the structure of the result set,
// you can handle column values.
if ( rsNumber == 1 ) {
while( rs.next() ) {
// handle your rs here
} // while rs
} // if rs is 1
else if ( rsNumber == 2 ) {
// call a method using this rs.
processMyResultSet( rs ); // example
} // if rs is 2
// ... etc
// check whether there exist more result sets
hasMoreResultSets = stmt.getMoreResults();
} // while results
Refer to:
- Multiple queries executed in java in single statement
- One of the similar postings on SO, for which I gave an answer.
