• Oracle开发常用函数与存储过程


    create or replace function Fuc_Get_AuthorName(RecID_In in varchar2, AdmID_In in varchar2) return varchar2 is
      Result varchar2(8000);
      names varchar2(4000);
    
      Cursor Cur_Get_AuthorNameS Is
          SELECT PEOPLENAME From TB_NEWS_CONTRI_AUTHOR Where REC_ID=RecID_In;
    
      Cursor Cur_Get_AuthorName Is
          SELECT PEOPLENAME From TB_NEWS_CONTRI_AUTHOR Where REC_ID=RecID_In And UNITID=AdmID_In;
    begin
    
      If RecID_In Is NULL Then
        Return '';
      End If;
    
      If AdmID_In Is NULL Then
        open Cur_Get_AuthorNameS;
        fetch Cur_Get_AuthorNameS into names;
        while Cur_Get_AuthorNameS%FOUND
        loop
            Result:=Result || names || '、';
            fetch Cur_Get_AuthorNameS into names;
        end loop;
        close Cur_Get_AuthorNameS;
      ELSE
        open Cur_Get_AuthorName;
        fetch Cur_Get_AuthorName into names;
        while Cur_Get_AuthorName%FOUND
        loop
            Result:=Result || names || '、';
            fetch Cur_Get_AuthorName into names;
        end loop;
        close Cur_Get_AuthorName;
      End If;
    
    
      if(Result is  null) Then
        Return '';
      End If;
    
      if length(Result)>0 then
         Result:=substr(Result,1,length(Result)-1);
      end if;
      return(Result);
    
      Exception
        When OTHERS Then
          Return '';
    end Fuc_Get_AuthorName;
    

    1.输出用"、"符合分隔多个作者列表

    2.获取数据库表的主键最大值

    3.根据分割类来分割字符串

    4.计算周岁的函数

    6.带排序的oracle分页存储过程(来自网络)

    --输入order by 的sqeuence是,应该为“ desc”或者“ asc”
    --若输入两个order by则,v_order_field=" a[sequence] ,order by b "
    
    CREATE OR REPLACE PROCEDURE TABLEPAGE_SELECT(v_page_size  int, --the size of a page of list
                           v_current_page int, --the current page of list
                           v_table_name varchar2, --the talbe name
                           v_order_field varchar2,--the order field
                           v_order_sequence varchar2,--the order sequence should by "_desc"or "_asc",_is blank.
                           --v_sql_select  varchar2, --the select sql for procedure
                           --v_sql_count  varchar2, --the count sql for procedure
                           --v_out_recordcount OUT int, --the num of return rows
                           p_cursor OUT refcursor_pkg.return_cursor) as
     v_sql     varchar2(3000); --the sql for select all rows of list
     v_sql_count  varchar2(3000); --the count sql for procedure
     v_sql_order  varchar2(2000); --the order of list
     v_count    int; -- the amount rows fo original list
     v_endrownum  int; --the end row num of the current page
     v_startrownum int; --the start row num of the current page
    BEGIN
     ----set the order of list
     if v_order_field!='NO' then
      v_sql_order :=' ORDER BY '|| v_order_field ||' '||v_order_sequence;
     else
       v_sql_order :='';
     end if;
     ----catch the amount rows of list
     v_sql_count:='SELECT COUNT(ROWNUM) FROM '||v_table_name;
     execute immediate v_sql_count into v_count;
     -- v_out_recordcount := v_count;
     ----set the value of start and end row
     if v_order_sequence='desc' then
      v_endrownum:=v_count-(v_current_page-1)*v_page_size;
      v_startrownum:=v_endrownum - v_page_size + 1;
     else
      v_endrownum:= v_current_page * v_page_size;
      v_startrownum := v_endrownum - v_page_size + 1;
     end if;
     ----the sql for page slide
     v_sql := 'SELECT * FROM (SELECT '||v_table_name||'.*, rownum rn FROM '||v_table_name||' WHERE rownum <= ' ||
          to_char(v_endrownum) ||' '|| v_sql_order||') WHERE rn >= ' ||
          to_char(v_startrownum)||' '||v_sql_order;
     open p_cursor for v_sql;
    END TABLEPAGE_SELECT; 
    
    --请问如何用SQL语句获取指定表的表结构
    --该表应包含以下字段:字段名、字段类型、字段大小、是否为空  
    
    SELECT   column_name   AS   FIELDNAME,data_type   AS   TYPE,data_length   ASSIZE,
    nullable   AS   ISNULL   FROM   ALL_tab_columns  
     where  table_name =  'TB_SYS_ORG_MEMBER'    
    
    SELECT * FROM ALL_TAB_COLUMNS 
    where owner='ZSZGW' and table_name='TB_SYS_ORG_MEMBER';   
    
    --根据字段注释查询字段
    
    SELECT A.TABLE_NAME,A.COMMENTS,B.COLUMN_NAME,B.COMMENTS
    FROM USER_TAB_COMMENTS A,USER_COL_COMMENTS B 
    WHERE A.TABLE_NAME=B.TABLE_NAME and b.COMMENTS like '%发放%' --介绍
    and a.table_name='TB_SYS_ORG_MEMBER';
    
    --1、SELECT * FROM ALL_TAB_COLUMNS where owner='USE1' and table_name ='B';  
    --2、desc 表名 
    --3、
    SELECT column_name AS FIELDNAME,data_type,data_length,
    nullable AS ISNULL FROM user_tab_columns where table_name = 'TB_SYS_ORG_MEMBER' 
    
    
    SELECT * FROM user_tab_columns where table_name = 'TB_SYS_ORG_MEMBER' 
    
    select userenv ('terminal') from dual
     
    select to_char(sysdate,'yyyy-MM-dd HH24:mi:ss') from dual;--mi是分钟 
     
    select user from dual
     
    SELECT S.SID SESSION_ID, S.USERNAME, DECODE(LMODE, 0, 'None', 1, 'Null', 2, 'Row-S (SS)', 3, 'Row-X (SX)', 4, 'Share', 5, 'S/Row-X (SSX)', 6, 'Exclusive', 
     TO_CHAR(LMODE)) MODE_HELD, DECODE(REQUEST, 0, 'None', 1, 'Null', 2, 'Row-S (SS)', 3, 'Row-X (SX)', 4, 'Share', 5, 'S/Row-X (SSX)', 6, 'Exclusive', 
     TO_CHAR(REQUEST)) MODE_REQUESTED, O.OWNER||'.'||O.OBJECT_NAME||' ('||O.OBJECT_TYPE||')', 
     S.TYPE LOCK_TYPE, L.ID1 LOCK_ID1, L.ID2 LOCK_ID2 FROM V$LOCK L, SYS.DBA_OBJECTS O,
      V$SESSION S WHERE L.SID = S.SID AND L.ID1 = O.OBJECT_ID ;
    

    5.获取数据表架构信息

    CREATE OR REPLACE FUNCTION Fuc_Get_FullAge(BirthDay_In in date, CallDay_In in date) RETURN integer IS
      age integer;
      
      BEGIN
    
      /*
      **给出出生日期,计算日期,返回周岁
      **1、如果计算日期和出生日期的月份相同,就要判断计算日期是否过了出生日期
      **2、如果是2月29日出生的,那如果是闰年,就是3月1号算增加1岁,如果不是闰年,3月2日增加1岁
      **
      */
      if BirthDay_In is null or CallDay_In is null then
          return  null;
      end if;
       
      --计算日期比出生日期小,返回NULL
      if (CallDay_In - BirthDay_In)<0 then
         return  null;
      end if;
      
      --计算日期   =   出生日期,返回0
      if (BirthDay_In - CallDay_In)=0 then
         return  0;
      end if;
    
      age := extract(year from CallDay_In)-extract(year from BirthDay_In)-1;
    
      ----如果月份相同,计算日期>出生日期,加1
      if   (extract(month from BirthDay_In) = extract(month from CallDay_In)) and (extract(day from BirthDay_In) < extract(day from CallDay_In)) then
          age := age + 1;
      end if;
    
      ----如果计算月份比出生月份大,加1
      if   (extract(month from BirthDay_In) < extract(month from CallDay_In)) then
       age := age + 1;
      end if;
    
      ----如果出生日期是2月29日,而计算日期是3月1日,那么计算日期是闰年,要减1
      if   (extract(month from BirthDay_In) = 2 and extract(day from BirthDay_In) = 29 and extract(month from CallDay_In) = 3 and extract(day from CallDay_In) = 1 and ((extract(year from CallDay_In) mod 4=0 and extract(year from CallDay_In) mod 100!=0 ) or extract(year from CallDay_In) mod 400=0)) then
       age := age - 1;
      end if;
    
      return age;
    
      Exception
        When OTHERS Then
          Return 0;
    
    end;
    
    CREATE OR REPLACE FUNCTION sf_split_string (strings VARCHAR2, substring VARCHAR2) RETURN Varchar2Varray IS
    /*---------------------------------------------------------------------------*
     功能:
         根据分割类来分割字符串
        输入参数:
         strings --输入字符串(如:aaaa|bbbb|cccc)
         substring --用于分割的标志(如:'  |  ' )
      输出参数:
         数组
    *---------------------------------------------------------------------------*/
    
    len integer := LENGTH(substring);
    lastpos integer := 1 - len;
    pos integer;
    num integer;
    i integer := 1;
    ret Varchar2Varray := Varchar2Varray(NULL);
    BEGIN
    LOOP
    pos := instr(strings, substring, lastpos + len);
    IF pos > 0 THEN --found
    num := pos - (lastpos + len);
    ELSE --not found
    num := LENGTH(strings) + 1 - (lastpos + len);
    END IF;
    
    IF i > ret.LAST THEN
    ret.EXTEND;
    END IF;
    
    ret(i) := SUBSTR(strings, lastpos + len, num);
    
    EXIT WHEN pos = 0;
    lastpos := pos;
    i := i + 1;
    END LOOP;
    
    RETURN ret;
    END;
    
    CREATE OR REPLACE FUNCTION Fuc_Get_MaxId( TableName_In IN Varchar2,FieldName_In IN Varchar2,CallMode_In IN Varchar2 ) Return  Varchar2 IS
    /*---------------------------------------------------------------------------*
     功能:
         获取数据库表的主键最大值。
        输入参数:
         TableName_In --输入需要查询数据库表名称
         FieldName_In --输入数据库表对应主键的字段名
         CallMode_In   --输入调用方式,缺省为'0'
      输出参数:
         新的12位主键值
    *---------------------------------------------------------------------------*/
        
      SqlStrTmp Varchar2(500);
      MaxFieldTmp Varchar2(12);
      MaxFieldVar Varchar2(12);
      TableNameTmp Varchar2(50);
    
      FieldNameTmp Varchar2(50);
     
      SysFieldTmp Varchar2(4);
    
      Cursor Cur_Sys_Var Is 
             Select SubStrb(VarValue,1,4) VarValue From Tb_Sys_Var Where VarName='CurrCode';
      
    BEGIN
    
      
      
      If TableName_In Is NULL Or FieldName_In Is NULL Then
        Return '000000000000';
      End If;
    
      TableNameTmp := Upper( TableName_In );
      FieldNameTmp := Upper( FieldName_In );
    
      Open Cur_Sys_Var;
      Fetch Cur_Sys_Var Into SysFieldTmp;
      If Cur_Sys_Var%NOTFOUND Then
        Close Cur_Sys_Var;
        Return '000000000000';
      End if;
      Close Cur_Sys_Var;
      
      SqlStrTmp := 'SELECT MAX(To_Number('||FieldNameTmp||')) FROM '||TableNameTmp
                ||' WHERE '||FieldNameTmp||' LIKE '''||SysFieldTmp||'%''';
      
      Execute Immediate SqlStrTmp INTO MaxFieldTmp;
      
      MaxFieldVar := SysFieldTmp||Lpad( To_Char(To_Number(Substrb(Nvl(MaxFieldTmp,SysFieldTmp||'00000000'),5))+1),8,'0');
    
      Return MaxFieldVar;
      
      Exception
        When OTHERS Then
          Return SysFieldTmp||'00000001';  
       
    END;
    
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  • 原文地址:https://www.cnblogs.com/yangpeng-jingjing/p/4556305.html
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