Java's Prepared Statement with Oracle Merge

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Java

SQL

Oracle

I have prepared an SQL Query for Oracle that uses Merge. However, when I try to use Java's Prepared Statements, I get the following error.

java.sql.SQLSyntaxErrorException: ORA-00928: missing SELECT keyword

at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:439)
at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:395)
at oracle.jdbc.driver.T4C8Oall.processError(T4C8Oall.java:802)
at oracle.jdbc.driver.T4CTTIfun.receive(T4CTTIfun.java:436)
at oracle.jdbc.driver.T4CTTIfun.doRPC(T4CTTIfun.java:186)
at oracle.jdbc.driver.T4C8Oall.doOALL(T4C8Oall.java:521)
at oracle.jdbc.driver.T4CPreparedStatement.doOall8(T4CPreparedStatement.java:205)
at oracle.jdbc.driver.T4CPreparedStatement.executeForRows(T4CPreparedStatement.java:1008)
at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:1307)
at oracle.jdbc.driver.OraclePreparedStatement.executeInternal(OraclePreparedStatement.java:3449)
at oracle.jdbc.driver.OraclePreparedStatement.execute(OraclePreparedStatement.java:3550)
at oracle.jdbc.driver.OraclePreparedStatementWrapper.execute(OraclePreparedStatementWrapper.java:1374)
at ke.co.smart.MemberResponse.memberUpdater(MemberResponse.java:267)
at ke.co.smart.MemberResponse.<init>(MemberResponse.java:184)
at ke.co.smart.Switch.serviceProcessor(Switch.java:181)
at ke.co.smart.Switch.run(Switch.java:359)

Below is the SQL Statement that I have prepared for execution.

String sql = "MERGE INTO smart.tmp_switch_membership dest USING (SELECT"
                + membershipNumber + " member," + prevMembershipNumber + "," + schemeCode
                + "," + schemePlan + "," + memberPlan + "," + primaryCareProvider
                + "," + employeeNumber + "," + employerCode + "," + employerDesc
                + "," + brokerCode + "," + brokerDesc + "," + numberOfBeneficiaries
                + " FROM DUAL) src ON src.member = dest.membership_number"
                + "WHEN NOT MATCHED THEN"
                + "INSERT(membership_number, prev_member_number, scheme_code,"
                + "scheme_plan, member_plan, primary_care_prov, correspondence_ind,"
                + "employee_number, employer_code, employer_desc, broker_agent_code,"
                + "broker_agent_desc, beneficiary_count)"
                + "VALUES(?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)";
        PreparedStatement ps = con.prepareStatement(sql);
        ps.setString(1, membershipNumber);
        ps.setString(2, prevMembershipNumber);
        ps.setString(3, schemeCode);
        ps.setString(4, schemePlan);
        ps.setString(5, memberPlan);
        ps.setString(6, primaryCareProvider);
        ps.setString(7, employeeNumber);
        ps.setString(8, employerCode);
        ps.setString(9, employerDesc);
        ps.setString(10, brokerCode);
        ps.setString(11, brokerDesc);
        ps.setInt(12, numberOfBeneficiaries.intValue());
        ps.execute();
        con.commit();
        ps.close();

Any help accorded will be appreciated.