Oracle存储过程中如何根据指定的参数判断该参数的值否存在数据表中？

Oracle存储过程中如何根据指定的参数判断该参数的值否存在数据表中，如果存在就执行update，如果不存在就执行insert，牛牛们谁有思路，提供下，感谢，关键是不知道怎么下手！
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5个牛币 Oracle 存储过程参数判断存在数据表
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迷彩风情 LV26 2014年10月17日
一：解决办法：如下，在这里还要感谢@遇见的热情帮助！
二：最后的的SQL如下,主要是看红色部分！
CREATE OR REPLACE PROCEDURE MIP.MIP_PARSE (xmlStr IN CLOB)
IS
   RENO     VARCHAR2 (100);
   AIRLINE  VARCHAR2 (100);
   FFID     VARCHAR2 (100);
   FFID_A   VARCHAR2 (100);
   FFID_D   VARCHAR2 (100);

   ABNS     VARCHAR2 (100);
   ACFT     VARCHAR2 (100);
   CHDT     VARCHAR2 (100);
   EIBT     VARCHAR2 (100);
   FATA     VARCHAR2 (100);
   FETA     VARCHAR2 (100);
   FSTA     VARCHAR2 (100);
   LMDT     VARCHAR2 (100);
   LMUR     VARCHAR2 (100);
   PSTM     VARCHAR2 (100);
   RWAY     VARCHAR2 (100);
   SPOT     VARCHAR2 (100);
   STND     VARCHAR2 (100);

   A_TOBT   VARCHAR2 (100);
   A_WEATHER     VARCHAR2 (100);
   ASAT     VARCHAR2 (100);
   BCTM     VARCHAR2 (100);
   BOTM     VARCHAR2 (100);
   BSTM     VARCHAR2 (100);
   C_TOBT   VARCHAR2 (100);
   COBT     VARCHAR2 (100);
   CTOT     VARCHAR2 (100);

   DINT     VARCHAR2 (100);
   DLAB     VARCHAR2 (100);
   DOUT     VARCHAR2 (100);
   EDDI     VARCHAR2 (100);
   EOBT     VARCHAR2 (100);
   EPGT     VARCHAR2 (100);
   EPOT     VARCHAR2 (100);
   FATD     VARCHAR2 (100);
   FSTD     VARCHAR2 (100);
   OFTM     VARCHAR2 (100);
   STDI     VARCHAR2 (100);
   TSAT     VARCHAR2 (100);
   
   --新增字段
   FLIGHTNUMBER VARCHAR2 (100);
   FLIGHTMARK   VARCHAR2 (100);
   
   --定义出港信息表要格式的时间字段
   A_TOBT_D VARCHAR2 (100);
   ASAT_D   VARCHAR2 (100);
   BCTM_D   VARCHAR2 (100);
   BOTM_D   VARCHAR2 (100);
   BSTM_D   VARCHAR2 (100);
   C_TOBT_D VARCHAR2 (100);
   COBT_D   VARCHAR2 (100);
   CTOT_D   VARCHAR2 (100);
   DINT_D   VARCHAR2 (100);
   DOUT_D   VARCHAR2 (100);
   EDDI_D   VARCHAR2 (100);
   EOBT_D   VARCHAR2 (100);
   EPGT_D   VARCHAR2 (100);
   EPOT_D   VARCHAR2 (100);
   FATD_D   VARCHAR2 (100);
   FSTD_D   VARCHAR2 (100);
   LMDT_D   VARCHAR2 (100);
   OFTM_D   VARCHAR2 (100);
   STDI_D   VARCHAR2 (100);
   TSAT_D   VARCHAR2 (100);
   
   --定义进港信息表要格式化的时间字段
   EIBT_A   VARCHAR2 (100);
   FATA_A   VARCHAR2 (100);
   FETA_A   VARCHAR2 (100);
   FSTA_A   VARCHAR2 (100);
   LMDT_A   VARCHAR2 (100);
   PSTM_A   VARCHAR2 (100);
   SPOT_A   VARCHAR2 (100);
   
   COUNTS   NUMBER(36);
   
   --出港信息要修改的除时间外的字段
   STND_D   VARCHAR2 (100);
   A_WEATHER_D VARCHAR2 (100);
   ABNS_D   VARCHAR2 (100);
   ACFT_D   VARCHAR2 (100);
   AIRLINE_D VARCHAR2 (100);
   DLAB_D   VARCHAR2 (100);
   LMUR_D   VARCHAR2 (100);
   RENO_D   VARCHAR2 (100);
   RWAY_D   VARCHAR2 (100);
   
   -- 进港信息要修改的除时间外的字段
   ABNS_A   VARCHAR2 (100);
   ACFT_A   VARCHAR2 (100);
   AIRLINE_A VARCHAR2 (100);
   CHDT_A   VARCHAR2 (100);
   RENO_A   VARCHAR2 (100);
   LMUR_A   VARCHAR2 (100);
   RWAY_A   VARCHAR2 (100);
   STND_A   VARCHAR2 (100);
   
   
BEGIN
   RENO := GetXmlNodeValue (xmlStr, 'RENO');
   AIRLINE := GetXmlNodeValue (xmlStr, 'AIRLINE');
   FFID := GetXmlNodeValue (xmlStr, 'FFID');

   ABNS := GetXmlNodeValue (xmlStr, 'ABNS');
   ACFT := GetXmlNodeValue (xmlStr, 'ACFT');
   CHDT := GetXmlNodeValue (xmlStr, 'CHDT');
   EIBT := GetXmlNodeValue (xmlStr, 'EIBT');
   FATA := GetXmlNodeValue (xmlStr, 'FATA');
   FETA := GetXmlNodeValue (xmlStr, 'FETA');
   FFID := GetXmlNodeValue (xmlStr, 'FFID');
   FSTA := GetXmlNodeValue (xmlStr, 'FSTA');
   LMDT := GetXmlNodeValue (xmlStr, 'LMDT');
   LMUR := GetXmlNodeValue (xmlStr, 'LMUR');
   PSTM := GetXmlNodeValue (xmlStr, 'PSTM');
   RWAY := GetXmlNodeValue (xmlStr, 'RWAY');
   SPOT := GetXmlNodeValue (xmlStr, 'SPOT');
   STND := GetXmlNodeValue (xmlStr, 'STND');

   A_TOBT := GetXmlNodeValue (xmlStr, 'A_TOBT');
   A_WEATHER := GetXmlNodeValue (xmlStr, 'A_WEATHER');
   ASAT := GetXmlNodeValue (xmlStr, 'ASAT');
   BCTM := GetXmlNodeValue (xmlStr, 'BCTM');
   BOTM := GetXmlNodeValue (xmlStr, 'BOTM');
   BSTM := GetXmlNodeValue (xmlStr, 'BSTM');
   C_TOBT := GetXmlNodeValue (xmlStr, 'C_TOBT');
   COBT := GetXmlNodeValue (xmlStr, 'COBT');
   CTOT := GetXmlNodeValue (xmlStr, 'CTOT');

   DINT := GetXmlNodeValue (xmlStr, 'DINT');
   DLAB := GetXmlNodeValue (xmlStr, 'DLAB');
   DOUT := GetXmlNodeValue (xmlStr, 'DOUT');
   EDDI := GetXmlNodeValue (xmlStr, 'EDDI');
   EOBT := GetXmlNodeValue (xmlStr, 'EOBT');
   EPGT := GetXmlNodeValue (xmlStr, 'EPGT');
   EPOT := GetXmlNodeValue (xmlStr, 'EPOT');
   FATD := GetXmlNodeValue (xmlStr, 'FATD');
   FSTD := GetXmlNodeValue (xmlStr, 'FSTD');
   OFTM := GetXmlNodeValue (xmlStr, 'OFTM');
   STDI := GetXmlNodeValue (xmlStr, 'STDI');
   TSAT := GetXmlNodeValue (xmlStr, 'TSAT');
   
   
   --出港信息表中时间字段的时间格式函数的用法
   A_TOBT_D := FORMATDATEVALUE (A_TOBT, 'A_TOBT_D');
   ASAT_D := FORMATDATEVALUE (ASAT, 'ASAT_D');
   BCTM_D := FORMATDATEVALUE (BCTM, 'BCTM_D');
   BOTM_D := FORMATDATEVALUE (BOTM, 'BOTM_D');
   BSTM_D := FORMATDATEVALUE (BSTM, 'BSTM_D');
   C_TOBT_D := FORMATDATEVALUE (C_TOBT, 'C_TOBT_D');
   COBT_D := FORMATDATEVALUE (COBT, 'COBT_D');
   CTOT_D := FORMATDATEVALUE (CTOT, 'CTOT_D');
   DINT_D := FORMATDATEVALUE (DINT, 'DINT_D');
   DOUT_D := FORMATDATEVALUE (DOUT, 'DOUT_D');
   EDDI_D := FORMATDATEVALUE (EDDI, 'EDDI_D');
   EOBT_D := FORMATDATEVALUE (EOBT, 'EOBT_D');
   EPGT_D := FORMATDATEVALUE (EPGT, 'EPGT_D');
   EPOT_D := FORMATDATEVALUE (EPOT, 'EPOT_D');
   FATD_D := FORMATDATEVALUE (FATD, 'FATD_D');
   FSTD_D := FORMATDATEVALUE (FSTD, 'FSTD_D');
   LMDT_D := FORMATDATEVALUE (LMDT, 'LMDT_D');
   OFTM_D := FORMATDATEVALUE (OFTM, 'OFTM_D');
   STDI_D := FORMATDATEVALUE (STDI, 'STDI_D');
   TSAT_D := FORMATDATEVALUE (TSAT, 'TSAT_D');
   
   --进港信息表中时间字段的时间格式函数的用法
   EIBT_A := FORMATDATEVALUE (EIBT, 'EIBT_A');
   FATA_A := FORMATDATEVALUE (FATA, 'FATA_A');
   FETA_A := FORMATDATEVALUE (FETA, 'FETA_A');
   FSTA_A := FORMATDATEVALUE (FSTA, 'FSTA_A');
   LMDT_A := FORMATDATEVALUE (LMDT, 'LMDT_A');
   PSTM_A := FORMATDATEVALUE (PSTM, 'PSTM_A');
   SPOT_A := FORMATDATEVALUE (SPOT, 'SPOT_A');
   
   --出港信息要修改的除时间外的字段
   STND_D := GetXmlNodeValue (xmlStr, 'STND');
   A_WEATHER_D := GetXmlNodeValue (xmlStr, 'A_WEATHER');
   ABNS_D := GetXmlNodeValue (xmlStr, 'ABNS');
   ACFT_D := GetXmlNodeValue (xmlStr, 'ACFT');
   AIRLINE_D := GetXmlNodeValue (xmlStr, 'AIRLINE');
   DLAB_D := GetXmlNodeValue (xmlStr, 'DLAB');
   LMUR_D := GetXmlNodeValue (xmlStr, 'LMUR');
   RENO_D := GetXmlNodeValue (xmlStr, 'RENO');
   RWAY_D := GetXmlNodeValue (xmlStr, 'RWAY');
   
   --进港信息要修改的除时间外的字段
   ABNS_A := GetXmlNodeValue (xmlStr, 'ABNS');
   ACFT_A := GetXmlNodeValue (xmlStr, 'ACFT');
   AIRLINE_A := GetXmlNodeValue (xmlStr, 'AIRLINE');
   CHDT_A := GetXmlNodeValue (xmlStr, 'CHDT');
   RENO_A := GetXmlNodeValue (xmlStr, 'RENO');
   LMUR_A := GetXmlNodeValue (xmlStr, 'LMUR');
   RWAY_A := GetXmlNodeValue (xmlStr, 'RWAY');
   STND_A := GetXmlNodeValue (xmlStr, 'STND');
   
   
   IF INSTR(FFID,'-D-') > 0 THEN
   
    FFID_D := FFID;
    
    --截取航班号
    FLIGHTNUMBER := SUBSTR(FFID_D,INSTR(FFID_D,'-',1)+1,INSTR(FFID_D,'-',INSTR(FFID_D,'-',1)+1)-INSTR(FFID_D,'-',1)-1);
    
    --截取出港标志
    
    FLIGHTMARK := SUBSTR(FFID_D,INSTR(FFID_D,'-',2,2)+1,INSTR(FFID_D,'-',2,3)-1-INSTR(FFID_D,'-',2,2));
    
    --UPDATE之前要先根据FFID查询一下看看数据表中是否已经存在该条数据，如果存在就UPDATE,如果不存在就SAVE
    
    SELECT COUNT(1) INTO COUNTS FROM TB_CMS_FLGTINFO_D where FFID = FFID_D;
    
    IF COUNTS > 0 THEN 
    
    UPDATE TB_CMS_FLGTINFO_D
    
    SET 
    
    A_TOBT = A_TOBT_D,
    A_WEATHER = A_WEATHER_D,
    ABNS = ABNS_D,
    ACFT = ACFT_D,
    AIRLINE = AIRLINE_D,
    ASAT = ASAT_D,
    BCTM = BCTM_D,
    BOTM = BOTM_D,
    BSTM = BSTM_D,
    C_TOBT = C_TOBT_D,
    COBT = COBT_D,
    CTOT = CTOT_D,
    DINT = DINT_D,
    DLAB = DLAB_D,
    DOUT = DOUT_D,
    EDDI = EDDI_D,
    EOBT = EOBT_D,
    EPGT = EPGT_D,
    EPOT = EPOT_D,
    FATD = FATD_D,
    FSTD = FSTD_D,
    LMDT = LMDT_D,
    LMUR = LMUR_D,
    OFTM = OFTM_D,
    RENO = RENO_D,
    RWAY = RWAY_D,
    STDI = STDI_D,
    STND = STND_D,
    TSAT = TSAT_D
    
    WHERE FFID = FFID_D;
    
    ELSE
    
    INSERT INTO TB_CMS_FLGTINFO_D (ID,A_TOBT,A_WEATHER,ABNS,ACFT,AIRLINE,ASAT,BCTM,BOTM,BSTM,C_TOBT,COBT,CTOT,DINT,DLAB,DOUT,EDDI,EOBT,EPGT,EPOT,FATD,FFID,FLIGHTNUMBER,
               FLIGHTMARK,FSTD,LMDT,LMUR,OFTM,RENO,RWAY,STDI,STND,TSAT)
     VALUES   (FLGTINFO_D_SEQ.NEXTVAL,
               A_TOBT_D,
               A_WEATHER,
               ABNS,
               ACFT,
               AIRLINE,
               ASAT_D,
               BCTM_D,
               BOTM_D,
               BSTM_D,
               C_TOBT_D,
               COBT_D,
               CTOT_D,
               DINT_D,
               DLAB,
               DOUT_D,
               EDDI_D,
               EOBT_D,
               EPGT_D,
               EPOT_D,
               FATD_D,
               FFID_D,
               FLIGHTNUMBER,
               FLIGHTMARK,
               FSTD_D,
               LMDT_D,
               LMUR,
               OFTM_D,
               RENO,
               RWAY,
               STDI_D,
               STND,
               TSAT_D);
    
    END IF;
    
   
   ELSE
   
     FFID_A := FFID;
    
     --截取航班号
     FLIGHTNUMBER := SUBSTR(FFID_A,INSTR(FFID_A,'-',1)+1,INSTR(FFID_A,'-',INSTR(FFID_A,'-',1)+1)-INSTR(FFID_A,'-',1)-1);
    
     --截取出港标志
     FLIGHTMARK := SUBSTR(FFID_A,INSTR(FFID_A,'-',2,2)+1,INSTR(FFID_A,'-',2,3)-1-INSTR(FFID_A,'-',2,2));
     
     --UPDATE之前要先根据FFID查询一下看看数据表中是否已经存在该条数据，如果存在就UPDATE,如果不存在就SAVE
     
     SELECT COUNT(1) INTO COUNTS FROM TB_CMS_FLGTINFO_A where FFID = FFID_A;

     IF COUNTS > 0 THEN
     
     UPDATE TB_CMS_FLGTINFO_A
     
     SET 
     
     ABNS = ABNS_A,
     ACFT = ACFT_A,
     AIRLINE = AIRLINE_A,
     CHDT = CHDT_A,
     RENO = RENO_A,
     EIBT = EIBT_A,
     FATA = FATA_A,
     FETA = FETA_A,
     FSTA = FSTA_A,
     LMDT = LMDT_A,
     LMUR = LMUR_A,
     PSTM = PSTM_A,
     RWAY = RWAY_A,
     SPOT = SPOT_A,
     STND = STND_A
     
     WHERE 
     
     FFID = FFID_A;
     
     ELSE
     
     INSERT INTO TB_CMS_FLGTINFO_A (ID,ABNS,ACFT,AIRLINE,CHDT,FFID,FLIGHTNUMBER,FLIGHTMARK,RENO,EIBT,FATA,FETA,FSTA,LMDT,LMUR,PSTM,RWAY,SPOT,STND)
     
     VALUES   (FLGTINFO_A_SEQ.NEXTVAL,
               ABNS,
               ACFT,
               AIRLINE,
               CHDT,
               FFID_A,
               FLIGHTNUMBER,
               FLIGHTMARK,
               RENO,
               EIBT_A,
               FATA_A,
               FETA_A,
               FSTA_A,
               LMDT_A,
               LMUR,
               PSTM_A,
               RWAY,
               SPOT_A,
               STND);
     
     END IF;
     
   END IF;

   COMMIT;
   
EXCEPTION

   WHEN OTHERS
   
   THEN
   
      DBMS_OUTPUT.PUT_LINE (SQLERRM);
      
END MIP_PARSE;
/
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