如何?像这样:

SQL> alter session enable parallel dml;

Session altered.

SQL> merge /*+ parallel(10) */ into emp e
  2    using dept d
  3    on (d.deptno = e.deptno)
  4    when matched then update set
  5      e.comm = e.comm * 1;

14 rows merged.

SQL>

PARALLEL 提示将启用读并行，但要同时启用写并行，您需要运行上述 ALTER SESSION 命令或使用提示 /*+ ENABLE_PARALLEL_DML */.

The PARALLEL hint will enable read-parallelism, but to also enable write-parallelism you will need to either run the above ALTER SESSION command or use the hint /*+ ENABLE_PARALLEL_DML */.