查詢返回2年

Question

我需要添加一對和語句到我的WHERE子句。

我需要從今天返回2年的數據。我不知道如何在SQL中編寫它。我的每一件事情別人了，所以它的代碼的末尾：

FUNCTION summarize_item_search_data (p_obj_code IN VARCHAR2, p_val2 IN VARCHAR2, 
                   p_sac IN NUMBER, p_job_type_id IN NUMBER, 
                   p_sup IN NUMBER) 
    RETURN sys_refcursor 
    IS 
    stmt  VARCHAR2(4000); 
    result_cur sys_refcursor; 
BEGIN 

    OPEN result_cur FOR 

    SELECT DISTINCT jp.id, jp.row_top.mwslin AS mwslin, jp.obj_code, jp.jobload_year, jp.row_top.fiscal_year AS fiscal_year, 
             val1s.sac, val2s.val2, val1s.val1, 
     DECODE(jp.row_top.val1_id, NULL, jp.row_top.nomenclature ,val1s.nomenclature) AS nomenclature, jp.row_top.sup AS sup 
     FROM schedules sch, job_plans JP, master_val1 val1s, master_val2 val2s, TABLE(val2s.group_id) (+) ntab, 
       groups pgds 
    WHERE 
-- stmt := stmt || ' AND ''' || p_year || ''' = ntab.fiscal_year(+)'; 
    (val1s.sac = p_sac OR p_sac IS NULL) AND 

    (UPPER(val2s.val2) LIKE UPPER(p_val2) OR p_val2 IS NULL) AND 

    (UPPER(jp.obj_code) LIKE UPPER(p_obj_code) OR p_obj_code IS NULL) AND 

    (jp.row_top.sup <= p_sup OR p_sup IS NULL) AND 

    (jp.row_top.job_type_id = p_job_type_id OR p_job_type_id IS NULL) 

    AND ntab.group_id = pgds.id(+) 
    AND jp.row_top.val1_id = val1s.id(+) 
    AND val1s.val2_id = val2s.id(+) 
    AND jp.jobload_year > 
    AND fiscal_year > 


    RETURN result_cur; 
    END summarize_item_search_data; 

Answer 1

@碎紙機的解決方案功能完善，但它不是sargable。即使今天沒有適用的指標，設計查詢，以便他們能夠採取可能在未來創建索引的優勢是一個很好的做法（假設它不添加顯著的複雜性）：

AND jp.jobload_year > TO_CHAR(ADD_MONTHS(CURRENT_DATE, -24),'YYYY') 
AND fiscal_year > TO_CHAR(ADD_MONTHS(CURRENT_DATE, -24),'YYYY') 

Answer 2

AND jp.jobload_year > ADD_MONTHS(CURRENT_DATE, -24) 
AND fiscal_year > ADD_MONTHS(CURRENT_DATE, -24) 

我看到那些字段不是日期時間，所以這是行不通的。您需要將它們轉換爲日期時間，或者將其轉換爲整數，並按年進行比較。與第一個選項去，你可以嘗試：

AND TO_DATE('1-1-'||jp.jobload_year) > ADD_MONTHS(CURRENT_DATE, -24) 
AND TO_DATE('1-1-'||fiscal_year) > ADD_MONTHS(CURRENT_DATE, -24) 

雖然它不是很動態。可以等待更好的解決方案。