根据Oracle 进程PID查询正在执行的SQL语句

根据Oracle 进程PID来查询正在执行的SQL语句，帮助优化SQL，提高性能

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SELECT   /*+ ORDERED */
         sql_text
    FROM v$sqltext a
   WHERE (a.hash_value, a.address) IN (
            SELECT DECODE (sql_hash_value,
                           0, prev_hash_value,
                           sql_hash_value
                          ),
                   DECODE (sql_hash_value, 0, prev_sql_addr, sql_address)
              FROM v$session b
             WHERE b.paddr = (SELECT addr
                                FROM v$process c
                               WHERE c.spid ='9786'))  －－－加粗的为Oracle的PID
ORDER BY piece ASC;