表名作为参数的动态游标

DECLAREv_table_name VARCHAR2(30) := 'CUX_MES_WIP_BARCODE_MAP';--l_rec        SYS_REFCURSOR;TYPE t_data IS TABLE OF VARCHAR2(30) INDEX BY BINARY_INTEGER;TYPE t_cur IS REF CURSOR;l_data       t_data;l_rec        t_cur;l_cur        VARCHAR2(4000);v_fm_barcode VARCHAR2(30) := 'cxy-p-001';v_to_barcode VARCHAR2(30) := 'cxy-p-002';v_barcode    VARCHAR2(30);
BEGINl_cur := 'select barcode from ' || v_table_name || ' where barcode >= ' ||''''||v_fm_barcode||'''' || ' and barcode <= ' ||''''||v_to_barcode || '''';dbms_output.put_line(l_cur);OPEN l_rec FOR l_cur;LOOPEXIT WHEN l_rec%NOTFOUND;FETCH l_rec BULK COLLECTINTO l_data;FOR i IN 1 .. l_data.count LOOPdbms_output.put_line(l_data(i));END LOOP;END LOOP;
END;

动态SQL

/*1.什么是动态SQL？动态SQL是指在运行PL/SQL块时动态输入SQL语句。在PL/SQL块中只能执行DDL（create、alter、drop）、DCL（grant、revoke）或比较灵活的SQL语句（如select子句不带where条件）；动态SQL的性能不如静态SQL，但是比较灵活；在PL/SQL块中编写动态SQL语句时需要将SQL语句存放到字符串变量中而且SQL语句可以包含占位符（以冒号开始）；2.动态SQL的语法2.1 使用execute immediate语句可以处理多数动态SQL操作如：DDL语句(create、alter、drop)、DML语句(insert、update、delete)、DCL(grant、revoke)以及单行的select子句；但是不能处理多行查询语句。2.2 使用open...for，fetch和close语句在游标中使用。2.3 使用批量动态SQL语句*/---------------------------------------------------------------***************************************************************1. 使用execute immediate---------------------------------------------------------------1.1 使用execute immediate处理DDL语句-----------------------------------------------------------------案例01：使用execute immediate处理DDL语句--createdeclarecreate_table  varchar2(200);begincreate_table:='create table ' ||'&table_name' ||'(sid int, sno int)';execute  immediate create_table  ;end;--案例02：使用execute immediate处理DDL语句---alterdeclarealter_table  varchar2(200);beginalter_table:='alter table &target_table_name modify &column_name varchar2(10)';execute  immediate alter_table  ;end;--案例03：使用execute immediate处理DDL语句---dropdeclaredrop_table  varchar2(200);begindrop_table:='drop table ' ||'&target_table_name';execute  immediate drop_table  ;end;--案例04：使用execute immediate处理DDL语句--drop tablecreate or replace procedure drop_table (table_name varchar2)is
sql_sta varchar2(200);beginsql_sta:='drop table ' ||table_name;execute immediate sql_sta;end;--调用方法：exec drop_table('accp');--案例05：使用execute immediate处理DDL语句--create+selectdeclareselect_sta varchar2(200);emp_rec emp%rowtype;beginexecute immediate'create table sodi(sid int, sno int)';select_sta:='select * from emp where empno=:id';execute  immediate select_sta  into emp_rec using &1;   /*使用占位符时，这个占位符是在引号内使用的*/end;---------------------------------------------------------1.2 使用execute immediate处理DCL语句------------------------------------------------------------案例01:使用execute immediate处理DCL语句--grantcreate or replace procedure grant_priv(priv varchar2, username varchar2)ispriv_stat varchar2(200);beginpriv_stat:=' grant '|| priv || ' to ' || username; --注意字符串和连接符之间的空格execute immediate priv_stat;end;--调用方法exec grant_priv('create session', 'scott');--案例02:使用execute immediate处理DCL语句--revokecreate or replace procedure revoke_priv(priv varchar2, username varchar2)ispriv_stat varchar2(200);beginpriv_stat:=' revoke '|| priv || ' from ' || username; --注意字符串和连接符之间的空格execute immediate priv_stat;end;--调用方法exec revoke_priv('create session', 'scott');----------------------------------------------------------------1.3.使用execute immediate处理DML语句----------------------------------------------------------------1.处理无占位符和return子句的DML语句--案例01：查询子句:selectdeclaresql_stat varchar2(100);beginsql_stat:='select * from emp';execute immediate sql_stat;end;--案例02：处理无占位符和return子句的DML语句--insertdeclareinsert_table varchar2(200);begininsert_table:='insert into &table_name values (&sid, &sno)';execute immediate insert_table;end;--案例03：处理无占位符和return子句的DML语句--updatedeclareupdate_table varchar2(200);beginupdate_table:='update &table_name set &column_name=&new_value ';execute immediate update_table;end;--案例06:处理无占位符和return子句的DML语句--deletedeclaredelete_table varchar2(200);begindelete_table:='delete from  &table_name  ';execute immediate delete_table;end;--案例05：新建一个表然后插入数据--create+insertdeclarecreate_table  varchar2(200);begincreate_table:='create table &table_name(sid int, sno int)';execute  immediate create_table  ;end;declareinsert_table varchar2(200);begininsert_table:='insert into &table_name values (&sid, &sno)';execute immediate insert_table;end;--案例06：同时实现新建一个表并插入数据--create+insertdeclarecreate_table  varchar2(200);insert_table varchar2(200);begincreate_table:='create table &table_name (sid int, sno int)';execute  immediate create_table  ;insert_table:='insert into &table_name values (&sid, &sno)';execute immediate insert_table;end;--案例07：同时实现新建一个表并插入数据--create+insert+update/*这里也可以分开写*/declarecreate_table  varchar2(200);insert_table varchar2(200);update_table varchar2(200);begincreate_table:='create table &table_name (sid int, sno int)';execute  immediate create_table  ;insert_table:='insert into &table_name values (&sid, &sno)';execute immediate insert_table;update_table:='update &table_name set &column_name=&new_value where sid=&old_value';execute immediate update_table;end;--案例08：同时实现新建一个表并插入数据--create+insert+update+deletedeclarecreate_table  varchar2(200);insert_table varchar2(200);update_table varchar2(200);delete_table varchar2(200);begincreate_table:='create table &table_name (sid int, sno int)';execute  immediate create_table  ;insert_table:='insert into &table_name values (&sid, &sno)';execute immediate insert_table;update_table:='update &table_name set &column_name=&new_value where sid=&old_value';execute immediate update_table;delete_table:='delete from &delete_tablename';execute immediate delete_table;end;--案例08：同时实现新建一个表并插入数据--create+insert+update+delete+insertdeclarecreate_table  varchar2(200);insert_table varchar2(200);update_table varchar2(200);delete_table varchar2(200);re_insert_table varchar2(200);begincreate_table:='create table &table_name (sid int, sno int)';execute  immediate create_table  ;insert_table:='insert into &table_name values (&sid, &sno)';execute immediate insert_table;update_table:='update &table_name set &column_name=&new_value where sid=&old_value';execute immediate update_table;delete_table:='delete from &delete_tablename';execute immediate delete_table;re_insert_table:='insert into &re_table_name values (&new_sid, &new_sno)';execute immediate re_insert_table;end;2.处理占位符的DML语句--案例01：处理占位符的DML语句:create+insertdeclarecreate_table  varchar2(200);insert_table varchar2(200);begincreate_table:='create table &table_name (sid int, sno int)';execute  immediate create_table  ;insert_table:='insert into &target_table_name values (:sid, :sno)';execute immediate insert_table using  &2,&3;end;--案例02：处理占位符的DML语句:create+insert_updatedeclarecreate_table  varchar2(200);insert_table varchar2(200);update_table varchar2(200);begincreate_table:='create table &table_name (sid int, sno int)';execute  immediate create_table  ;insert_table:='insert into &target_table_name values (:sid, :sno)';execute immediate insert_table using  &1,&2;update_table:='update &update_tablename set &update_column_name=:new_value where &condition_column=:old_value ';execute immediate update_table using &3 ,&4;end;---ordeclarecreate_table  varchar2(200);insert_table varchar2(200);update_table varchar2(200);begincreate_table:='create table &新建的表名 (sid int, sno int)';execute  immediate create_table  ;insert_table:='insert into &插入数据的表名 values (:sid, :sno)';execute immediate insert_table using  &sid的值 ,&sno的值;update_table:='update &被更新的表名 set &更新的列名=:new_value where &条件列=:old_value ';execute immediate update_table using &新值 ,&条件列的值;end;--案例03:处理占位符的DML语句:create+update+insert+deletedeclarecreate_table  varchar2(200);insert_table varchar2(200);update_table varchar2(200);delete_table varchar2(200);begincreate_table:='create table &table_name (sid int, sno int)';execute  immediate create_table  ;insert_table:='insert into &target_table_name values (:sid, :sno)';execute immediate insert_table using  &1,&2;update_table:='update &update_tablename set &update_column_name=:new_value where &update_condition_column=:delete_condition_column_value ';execute immediate update_table using &3 ,&4;delete_table:='delete from &dele_table_name where &delete_condition_column=:delete_condition_column_value';execute immediate delete_table using &5;end;---执行过程：SQL> declare2  create_table  varchar2(200);3  insert_table varchar2(200);4  update_table varchar2(200);5  delete_table varchar2(200);6  begin7  create_table:='create table &table_name (sid int, sno int)';8  execute  immediate create_table  ;910  insert_table:='insert into &target_table_name values (:sid, :sno)';11  execute immediate insert_table using  &1,&2;1213  update_table:='update &update_tablename set &update_column_name=:new_valuewhere &update_condition_column=:delete_condition_column_value ';14  execute immediate update_table using &3 ,&4;1516  delete_table:='delete from &dele_table_name where &delete_condition_column=:delete_condition_column_value';17  execute immediate delete_table using &5;18  end;19  /输入 table_name 的值:  sz原值    7: create_table:='create table &table_name (sid int, sno int)';新值    7: create_table:='create table sz (sid int, sno int)';输入 target_table_name 的值:  sz原值   10: insert_table:='insert into &target_table_name values (:sid, :sno)';新值   10: insert_table:='insert into sz values (:sid, :sno)';输入 1 的值:  101输入 2 的值:  201原值   11: execute immediate insert_table using  &1,&2;新值   11: execute immediate insert_table using  101,201;输入 update_tablename 的值:  sz输入 update_column_name 的值:  sid输入 update_condition_column 的值:  sno原值   13: update_table:='update &update_tablename set &update_column_name=:new_value where &update_condition_column=:delete_condition_column_value ';新值   13: update_table:='update sz set sid=:new_value where sno=:delete_condition_column_value ';输入 3 的值:  1001输入 4 的值:  201原值   14: execute immediate update_table using &3 ,&4;新值   14: execute immediate update_table using 1001 ,201;输入 dele_table_name 的值:  sz输入 delete_condition_column 的值:  sno原值   16: delete_table:='delete from &dele_table_name where &delete_condition_column=:delete_condition_column_value';新值   16: delete_table:='delete from sz where sno=:delete_condition_column_value';输入 5 的值:  201原值   17: execute immediate delete_table using &5;新值   17: execute immediate delete_table using 201;PL/SQL 过程已成功完成。SQL> select * from sz;未选定行3.处理包含returning子句的DML语句--案例01：处理包含returning子句的DML语句--create+insert+updatedeclarecreate_table varchar2(200);insert_table varchar2(200);update_table varchar2(200);res varchar2(100);begincreate_table:='create table &new_table_name (sid int, sno int)';execute immediate create_table;insert_table:='insert into &insert_target_table_name values (:sid, :sno)';execute immediate insert_table using &1,&2 ;update_table:='update &update_target_table_name set &udpate_column_name=:new_value where &condition_column_name=:old_value  returning &returning_name into :res';execute immediate update_table using &3,&4returning into res;dbms_output.put_line('the result is : ' ||res);end;