oracle sql語句錦集

列出兩個月份之間所有的月份

在這裏插入代碼片SELECT
  TO_CHAR( ADD_MONTHS( TO_DATE( '201804', 'yyyyMM' ), ROWNUM - 1 ), 'yyyyMM' ) AS monthlist 
 FROM
  DUAL CONNECT BY ROWNUM <= months_between(
   to_date( '201809', 'yyyyMM' ),
  to_date( '201801', 'yyyyMM' ))+1

//查詢出數據沒有的話就補0

在這裏插入代碼片select  a.monthlist,nvl(b.ENTRY_COUNT,0) as AAA from
(SELECT
  TO_CHAR( ADD_MONTHS( TO_DATE( '201904', 'yyyyMM' ), ROWNUM - 1 ), 'yyyyMM' ) AS monthlist 
 FROM
  DUAL CONNECT BY ROWNUM <= months_between(
   to_date( '201912', 'yyyyMM' ),
   to_date( '201904', 'yyyyMM' ))+1) a  
LEFT JOIN (SELECT
 TIME,
 SUM (ENTRY_COUNT) ENTRY_COUNT
FROM
 (
  SELECT
   A . TIME,
   SUM (A .ENTRY_COUNT) ENTRY_COUNT
  FROM
   EXP_HOT_STATISTICS A
  WHERE
   1 = 1
  AND "SUBSTR" (A . TIME, 0, 6) BETWEEN '201903'
  AND '201912'
  AND (
	 KEY_WORD_TYPE LIKE '%奶粉%'
  )
  AND A .KEY_WORD_STATUS = '1'
  GROUP BY
   A . TIME
  ORDER BY
   ENTRY_COUNT DESC
 )
GROUP BY
 TIME
ORDER BY
 TIME ASC) b
on a.MONTHLIST =b.TIME
ORDER BY MONTHLIST

//列轉行並且時間按從小打到排序

SELECT
	listagg (TIME, ',') WITHIN GROUP (ORDER BY TIME ASC) TIME,
	listagg (ENTRY_COUNT, ',') WITHIN GROUP (ORDER BY TIME ASC) ENTRY_COUNT_NUMBER,
	KEY_WORD_TYPE
FROM
	(
		SELECT
			A . TIME AS TIME,
			A .KEY_WORD_TYPE,
			'' || SUM (A .ENTRY_COUNT) ENTRY_COUNT
		FROM
			EXP_HOT_STATISTICS A
		WHERE
			1 = 1
		AND "SUBSTR" (A . TIME, 0, 6) BETWEEN '201902'
		AND '201911'
		AND (
			KEY_WORD_TYPE LIKE '%奶粉%'
			OR KEY_WORD_TYPE LIKE '%運動鞋%'
		)
		AND A .KEY_WORD_STATUS = '1'
		GROUP BY
			A .KEY_WORD_TYPE,
			A . TIME
	)
GROUP BY
	KEY_WORD_TYPE