— 查詢每天執行慢的SQL：
SELECT S.SQL_TEXT,
S.SQL_FULLTEXT,
S.SQL_ID,
ROUND(ELAPSED_TIME / 1000000 / (CASE
WHEN (EXECUTIONS = 0 OR NVL(EXECUTIONS, 1 ) = 1) THEN
1
ELSE
EXECUTIONS
END),
2) “執行時間’S’”,
S.EXECUTIONS “執行次數”,
S.OPTIMIZER_COST “COST”,
S.SORTS,
S.MODULE, –連線模式（JDBC THIN CLIENT：程式）
– S.LOCKED_TOTAL,
S.PHYSICAL_READ_BYTES “物理讀”,
– S.PHYSICAL_READ_REQUESTS “物理讀請求”,
S.PHYSICAL_WRITE_REQUESTS “物理寫”,
– S.PHYSICAL_WRITE_BYTES “物理寫請求”,
S.ROWS_PROCESSED “返回行數”,
S.DISK_READS “磁碟讀”,
S.DIRECT_WRITES “直接路徑寫”,
S.PARSING_SCHEMA_NAME,
S.LAST_ACTIVE_TIME
FROM GV$SQLAREA S
WHERE ROUND(ELAPSED_TIME / 1000000 / (CASE
WHEN (EXECUTIONS = 0 OR NVL(EXECUTIONS, 1 ) = 1) THEN
1
ELSE
EXECUTIONS
END),
2) > 5 –100 0000微秒=1S
AND S.PARSING_SCHEMA_NAME = USER
AND TO_CHAR(S.LAST_LOAD_TIME, ‘YYYY-MM-DD’) =
TO_CHAR( SYSDATE, ‘YYYY-MM-DD’ )
AND S.COMMAND_TYPE IN (2 , 3, 5, 6 , 189)
ORDER BY “執行時間’S’” DESC;