1.娉ㄦ剰浜嬮」:
(1)Pro*C鍙敮鎸佷竴緇存暟緇?浣哻har綾誨瀷闄ゅ,瀹冨彲浠ユ敮鎸佷簩緇存暟緇?
(2)Pro*C涓嶆敮鎸佹暟緇勬寚閽?
(3)Pro*C鎵鏀寔鐨勬渶澶х淮鏁版槸32767.
2.鏁扮粍鍙橀噺鐨勫０鏄庝篃澹版槑鎴愬涓誨彉閲忕殑褰㈠紡.濡?
EXEC SQL BEGIN DECLARE SECTION
char pwd[50];
char v_name[100];
EXEC SQL END DECLARE SECTION
3.濡備綍鍦⊿QL璇彞涓嬌鐢ㄦ暟緇勫彉閲?
鍙渶瑕佺粰鍑?鍜屽彉閲忓悕縐?涓嶈涓笅鏍?閫氳繃SQL璇彞鏌ュ嚭鐨勬暟鎹細鑷姩鎺掑垪.
EXEC SQL BEGIN DECLARE SECTION;
char pwd[ 30 ] ;
char v_l_name[ 100 ] ;
short ind_l_name ;
EXEC SQL END DECLARE SECTION;
................................
................................
EXEC SQL select last_name
INTO :v_l_name :ind_l_name
from emp
where id=1 ;
浠ヤ笅鐨勪緥瀛愭槸閿欒鐨?:
for(int i=0;i<100;i++)
{
EXEC SQL select last_name
INTO :v_l_name[i] :ind_l_name[i]
from emp
where id=1 ;
}
4.鎸囩ず鍙橀噺涔熷彲浠ュ畾涔夋垚鏁扮粍,浣嗗厓绱犳暟搴斿ぇ浜庢垨絳変簬鏁扮粍鍙橀噺鏁?濡備笅渚嬪瓙:
EXEC SQL BEGIN DECLARE SECTION;
int emp_number[100];
short ind_emp_number[100];//姝ゅ鐨勬寚紺哄彉閲忔暟涓嶈兘灝戜簬鏁扮粍鍙橀噺鏁?
char emp_name[100][15];
EXEC SQL END DECLARE SECTION;
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1.鎸囩ず鍙橀噺鐢ㄤ簬澶勭悊鏁版嵁搴撶殑NULL鍊?鐩戠潱鍜岀鐞嗕笌鍏剁浉鍏寵仈鐨勫涓誨彉閲?鏄煭鏁村瀷鍙橀噺(short).
2.涓涓寚紺哄彉閲忓彧綆＄悊涓涓涓誨彉閲?鎸囩ず鍙橀噺绱ц窡鍦ㄥ涓誨彉閲忓悗闈?
3.璇硶緇撴瀯鏈変袱縐嶆柟寮?
(1):host_variable INDICATOR :indicator_varible
(2):host_variable : indicator_variable//涔犳儻涓婂父鐢ㄦ縐嶆柟娉?BR>
4.鎸囩ず鍙橀噺鐨勪綔鐢?
涓昏鐢ㄥ湪杈撳嚭,鍗沖綋瀹夸富鍙橀噺鐢ㄤ簬鎺ユ敹鏁版嵁搴撶殑榪斿洖鏁版嵁鏃?閫氳繃鍦ㄥ涓誨彉閲忓悗鐢ㄦ寚紺哄彉閲?
媯嫻嬫槸鍚﹁繑鍥炰簡NULL.
-1:琛ㄧず鏁版嵁搴撹〃鍒楃殑鍊間負NULL
=0:灝嗗師鍊煎師灝佷笉鍔ㄧ殑璧嬬粰瀹夸富鍙橀噺.
>0:灝嗘暟鎹簱琛ㄥ垪鐨勫兼埅鏂悗璧嬬粰瀹夸富鍙橀噺,鎸囩ず鍙橀噺鍊間負璇ュ垪鍊肩殑鍘熷闀垮害.
5.鎸囩ず鍙橀噺鐨勪緥瀛愬涓?
涔犳儻涓婁竴鑸湪澹版槑瀹夸富鍙橀噺鐨勬椂鍊欏湪鍏跺墠闈㈠姞v_,鍦ㄥ０鏄庢寚紺哄彉閲忔椂鍊欏湪鍏跺墠闈㈠姞ind_.
#include <iostream>
using namespace std;
EXEC SQL INCLUDE SQLCA;
//澹版槑瀹夸富鍙橀噺
EXEC SQL BEGIN DECLARE SECTION;
char pwd[ 30 ] ;
char v_l_name[ 100 ] ;
short ind_l_name ;
EXEC SQL END DECLARE SECTION;
int main(){
EXEC SQL WHENEVER SQLERROR STOP ;//璇存槑瀵箂qlerror鐨勫鐞嗘柟寮?BR> //榪炴帴鏁版嵁搴?BR> cout<<"enter username and passwd>";
cin>>pwd ;
EXEC SQL CONNECT :pwd;
cout<<"connect db using "<< pwd<<" ok."<<endl;
EXEC SQL select last_name
into :v_l_name :ind_l_name
from emp
where id=1 ;
//閫氳繃鎸囩ず鍙橀噺鏉ュ垽鏂涓誨彉閲忕殑鍊兼槸鍚︿負NULL,騫惰繘琛岃緭鍑哄鐞?
if( ind_l_name == -1 ){
cout<<"-- NULL --" << endl;
}else if( ind_l_name > 0 ){
cout<< v_l_name <<"..."<< endl;
}else{
cout<<"last name=>" << v_l_name << endl;
}
//瀹屾垚SQL璇彞騫墮噴鏀懼唴瀛?
EXEC SQL COMMIT WORK RELEASE ;
return 0 ;
}
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2.瀹夸富鍙橀噺涓鑸畾涔夊湪璇彞EXEC SQL BEGIN DECLARE SECTION鍜孍XEC SQL
END DECLARE SECTION涔嬮棿.
3.瀹夸富鍙橀噺鐨勬暟鎹被鍨?BR> 鏁版嵁綾誨瀷 鎻忚堪
char 鍗曞瓧絎?BR> char[n] N涓畾闀垮瓧絎︽暟緇?BR> int 鏁存暟
short 鐭暣鏁?BR> long 闀挎暣鏁?BR> float 鍗曠簿搴︽誕鐐規暟
double 鍙岀簿搴︽誕鐐規暟
VARCHAR[n] 鍙橀暱瀛楃涓?BR>4.瀹夸富鍙橀噺鐨勪嬌鐢?BR> 鑻ュ涓誨彉閲忓湪SQL璇彞涓嬌鐢ㄦ椂,搴斿湪瀹夸富鍙橀噺鍓嶉潰鍔犲啋鍙?:).
杈撳叆===>灝嗗簲鐢ㄧ▼搴忕殑鏁版嵁浼犻掑埌鏁版嵁搴撲腑.
int salary,emp_number;
cin>>salary;cin>>emp_number;
EXEC SQL update emp set sal=:salary where
empno=:emp_number;
杈撳嚭===>灝嗘暟鎹簱涓殑鏁版嵁浼犻掑埌搴旂敤紼嬪簭涓?
float v_salary;
char v_job;
EXEC SQL select sal,job INTO:v_salary,:v_job from emp
where empno=888;
cout<<v_salary<<v_job;
5.浣跨敤瀹夸富鍙橀噺鐨勬敞鎰忎簨欏?
(1)鏈濂藉湪begin 鍜宔nd涔嬮棿澹版槑瀹夸富鍙橀噺
(2)鍦―DL璇彞涓笉鑳戒嬌鐢ㄥ涓誨彉閲?涓嬮潰鐨勪緥瀛愭槸閿欒鐨?
char v_name[30];
cin>>v_name;
EXEC SQL DROP TABLE:v_name;
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鐩殑:瀹屾垚Pro*C婧愮▼搴忓埌綰疌婧愮▼搴忕殑杞崲.
甯哥敤鐨勯緙栬瘧閫夐」:
(1)INAME=path and filename(棰勭紪璇戞枃浠剁殑杈撳叆鍚嶅瓧)
(2)ONAME=path and filename(棰勭紪璇戞枃浠剁殑杈撳嚭鍚嶅瓧)
(3)INCLUDE=path(澶存枃浠舵墍鍦ㄧ殑璺緞)
=====>澶氫釜澶存枃浠惰〃杈綢NCLUDE=(璺緞鍚?,璺緞鍚?.......)
(4)PARSE=FULL|PARTIA|NONE(default is FULL for C, Other is for C++)
褰撲負C++鏃朵竴鑸敤NONE.
(5)CODE=ANSI_C|CPP(default is ANSI_C),褰撲負C++鏃剁敤CPP.
(6)USERID=username/password
(7)SQLCHECK 鐢ㄤ簬鏄惁瀵筍QL璇硶浣滄嫻?
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2.綆瑕佽鏄?
鍦ㄩ氱敤緙栫▼璇█涓嬌鐢ㄧ殑SQL縐頒負宓屽叆寮廠QL.鐩殑鏄疨ro*C/C++灝嗕嬌
C/C++鎴愪負璁塊棶鏁版嵁搴撶殑宸ュ叿.
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