SQL语法常用总结

--sql比较两个字符串是否包含
INSTR(MASTER_WO, A.WORK_ORDER) > 0;

--case when 语句
CASE WHEN INSTR(MASTER_WO, A.WORK_ORDER) > 0 THEN 'OK' ELSE '不一致' END RES;

--根据某栏位排序
SELECT CHECK_IN_TIME,
                       ROW_NUMBER ()
                           OVER (PARTITION BY SERIAL_NUMBER ORDER BY CHECK_IN_TIME DESC)
                           RN
                  FROM table 
                 WHERE sn ='123';

--将字符串时间转化成时间格式比较
TO_DATE( A.WORK_DATE || LPAD( A.WORK_TIME, 2, '0' ) || '0000', 'YYYYMMDDHH24MISS' ) >= TO_DATE( REPLACE ( '2021-01-01', '-', '' ) || '08' || '0000', 'YYYYMMDDHH24MISS' )

TO_CHAR( B.OUT_PROCESS_TIME, 'yyyyMMddhh24miss' ) BETWEEN '20230715' || '00' || '0000' AND '20210802' || '08' || '0000'

--判断字符串空值就赋值为0
NVL (J.FAIL_QTY, 0);

--判断字符串值
DECODE (H.CURRENT_STATUS,
                                     '0', 'PASS',
                                     '9', 'Retest',
                                     '1', 'FAIL');

--截取字符前或后面的字符串
SELECT SUBSTR('KSLRJ423350007_2', 1, INSTR('KSLRJ423350007_2', '_')-1) AS result FROM dual;
 SELECT SUBSTR('KSLRJ423350007_2', INSTR('KSLRJ423350007_2', '_')+1, 1) AS result FROM dual;

--查询正在运行的job
SELECT job,
       what,
       to_char(last_date, 'yyyy - mm - dd hh24:mi:ss') last_date,
       to_char(next_date, 'yyyy - mm - dd hh24:mi:ss') next_date,
       interval
  FROM dba_jobs;

--查询oracle相同行的数据：
select wo,item_ipn from IMES.p_check_bom a 
          where  rowid< (select max(rowid) from IMES.p_check_bom 
              where wo=a.wo and item_ipn=a.item_ipn);

--查询数据库表的数据量：
SELECT table_name, num_rows
FROM all_tables
WHERE table_name IN ('P_REWORK_NO');

--分组查询
SELECT
    T.PROCESS_ID,
    A.PROCESS_NAME,
    COUNT( 1 ) RepassQTY 
FROM
    (
    SELECT DISTINCT
        A.SERIAL_NUMBER,
        A.PROCESS_ID,
        A.CURRENT_STATUS,
        ROW_NUMBER ( ) OVER ( PARTITION BY A.SERIAL_NUMBER, A.PROCESS_ID ORDER BY A.OUT_PROCESS_TIME DESC ) RN 
    FROM
        table1 A 
    WHERE
        A.OUT_PROCESS_TIME BETWEEN TO_DATE( '2023-09-20 08:00:00', 'YYYY-MM-DD HH24:MI:SS' ) 
        AND TO_DATE( '2023-10-12 20:00:00', 'YYYY-MM-DD HH24:MI:SS' ) 
        AND ROUTE_ID = '110001520' 
    ORDER BY
        SERIAL_NUMBER,
        PROCESS_ID 
    ) T,
    table2 A 
WHERE
    1 = 1 
    AND T.RN > 1 --AND T.CURRENT_STATUS = 0
    
    AND T.PROCESS_ID = A.PROCESS_ID 
GROUP BY
    T.PROCESS_ID,
    A.PROCESS_NAME;