PL/SQL ѧϰ±Ê¼Ç3
SQL> var a number
SQL> begin
2 :a :=1000;
3 end;
4 /
PL/SQL procedure successfully completed.
SQL> edit
Wrote file afiedt.buf
1 begin
2 dbms_output.put_line(:a);
3* end;
SQL> /
ͨ¹ýÕâ¸ö´úÂë¿ÉÒÔ¿´³öͨ¹ýpl/sql³õʼ»¯¸³ÖµµÄBind variable¿ÉÒÔ±»ÆäËûPl/sql³ÌÐòµ÷ÓÃ
%type ÀàÐÍÓ¦Óõϰ Èç¹ûÇ°ÃæÓõÄÊÇdatabase columnµÄ»° ÄÇô²»¿ÉÒÔ¼Ónot null,Ç°ÃæÒýÓõÄÊÇÉùÃ÷µÄ±äÁ¿¿ÉÒÔÓ¦ÓÃnot null
A NOT NULLdatabase column constraint does not apply to variables that are declared using %TYPE.
Therefore, if you declare a variable using the %TYPEattribute that uses a database column defined as NOT
NULL, you can assign the NULLvalue to the variable.
eg:
°ó¶¨±äÁ¿
A bind variable is a variable that you declare in a host environment.
Bind variables can be used to pass run-time values, either number or character, into or out of one or more PL/SQL programs. The PL/SQL
programs use bind variables as they would use any other variable. You can reference variables declared in the
host or calling environment in PL/SQL statements, unless the statement is in a procedure, function, or
package. This includes host language variables declared in precompiler programs, screen fields in Oracle Developer Forms applications, and iSQL*Plus bind variables.
°ó¶¨±äÁ¿¿ÉÒÔÔÚÖ÷»ú»·¾³ÏÂÉùÃ÷ ¿ÉÒÔÔÚsqlplus ÕâÖÖÓ¦ÓóÌÐòÏÂÉùÃ÷ È»ºópl/sql³ÌÐòÀ´µ÷Óà µ÷ÓÃÐèÒªÔڸñäÁ¿Ç°¼Ócolon
¸³ÖµµÄʱºò¿ÉÒÔʹÓà exec :var_name := 10000; or begin :var_name := 1000 end; »òÕßÊÇÔÚPL/SQLÖи³Öµ
print(sqlplus command)¿ÉÒÔ´òÓ¡³öÕâ¸öÖµ
SQL> var result number
SQL> begin
2 select (sal*12) + nvl(comm,0)
3 into :result
4 from emp
5 where empno = 7369;
6 end;
7 /
PL/SQL procedure successfully completed.
SQL> print result
RESULT
------
9600
SQL> exec :result = 10000
BEGIN :result = 10000; END;
*
ERROR at line 1:
ORA-06550: line 1, column 15:
PLS
Ïà¹ØÎĵµ£º
SQL²Ù×÷È«¼¯
ÏÂÁÐÓï¾ä²¿·ÖÊÇMssqlÓï¾ä£¬²»¿ÉÒÔÔÚaccessÖÐʹÓá£
SQL·ÖÀࣺ
DDL—Êý¾Ý¶¨ÒåÓïÑÔ(CREATE£¬ALTER£¬DROP£¬DECLARE)
DML—Êý¾Ý²Ù×ÝÓïÑÔ(SELECT£¬DELETE£¬UPDATE£¬INSERT)
DCL—Êý¾Ý¿ØÖÆÓïÑÔ(GRANT£¬REVOKE£¬COMMIT£¬ROLLBACK)
Ê×ÏÈ,¼òÒª½éÉÜ»ù´¡Óï¾ä£º
1¡¢ËµÃ÷£º´´½¨Êý¾Ý¿â
CREATE ......
ϱí˵Ã÷ÔÚ Microsoft SQL Server Êý¾Ý¿âÖж¨ÒåµÄ£¬»òÔÚ Transact-SQL
Óï¾äÖÐÒýÓõĸ÷ÖÖ¶ÔÏóµÄ×î´óÖµ£¨ÊýÁ¿»ò´óС£©¡£ÏÂ±í²»°üº¬ Microsoft® SQL Server 2000™ Windows® CE °æ¡£
×î´óÖµ£¨ÊýÁ¿»ò´óС£©
¶ÔÏó
SQL Server 7.0
SQL Server 2000
Åú´¦Àí´óС
65,536 * ÍøÂçÊý¾Ý°ü´óС1
65,536 * Í ......
1¡¢ÔÚÁíһ̨»úÆ÷ÉϽ¨Á¢¶ÀÁ¢µÄÊý¾Ý¿â·þÎñÆ÷£¬×÷ΪÁ´½ÓÄ¿±ê
2¡¢±¾µØÊý¾Ý¿â·þÎñÆ÷ÉÏÌí¼Ó“Á´½Ó·þÎñÆ÷”£º
Ãû×Ö£ºËæ±ãȡһ¸öÃû×Ö
·þÎñÆ÷ÀàÐÍ£ºÑ¡ÔñÊý¾ÝÔ´£ºMicrosoft OLE DB Provider for SQL Server
Êý¾ÝÔ´£ºÐ´±ðÃû£¨ÔÚ¿Í»§¶ËÍøÂçʵÓù¤¾ßÖÐÉèÖã©
Ñ¡ÖÐRPCºÍRPCÊä³ö ......
SQLÊÖ¹¤×¢Èë´óÈ«
2006Äê08ÔÂ11ÈÕ ÐÇÆÚÎå 21:00
±È·½ËµÔÚ²éѯidÊÇ50µÄÊý¾Ýʱ£¬Èç¹ûÓû§´«½üÀ´µÄ²ÎÊýÊÇ50 and 1=1£¬Èç¹ûûÓÐÉèÖùýÂ˵ϰ£¬¿ÉÒÔÖ±½Ó²é³öÀ´£¬SQL ×¢ÈëÒ»°ãÔÚASP³ÌÐòÖÐÓöµ½×î¶à£¬
¿´¿´ÏÂÃæµÄ
1.ÅжÏÊÇ·ñÓÐ×¢Èë
;and 1=1
;and 1=2
2.³õ²½ÅжÏÊÇ·ñÊÇmssql
;and user>0
3.ÅжÏÊý¾Ý¿âϵͳ
;and ......
create PROCEDURE [dbo].[P_PageTest]
@SQL Nvarchar(max), --SQLÓï¾ä²»°üÀ¨ÅÅÐò
@CurPage int, --µ±Ç°Ò³
@PageRows int, --Ò³Ãæ³ß´ç
@Order Nvarchar(20), --ÅÅÐò×Ö¶Î
@OrderType Nvarchar( ......