表名作为參数的动态游标
DECLARE
v_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);
BEGIN l_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;
LOOP
EXIT WHEN l_rec%NOTFOUND;
FETCH l_rec BULK COLLECT
INTO l_data;
FOR i IN 1 .. l_data.count LOOP dbms_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块中仅仅能运行DDL（create、alter、drop）、DCL
（grant、revoke）或比較灵活的SQL语句（如select子句不带where条件）；
动态SQL的性能不如静态SQL，可是比較灵活；
在PL/SQL块中编写动态SQL语句时须要将SQL语句存放到字符串变量中并且SQL语句能够包括占位符（以冒号開始）； 2.动态SQL的语法
2.1 使用execute immediate语句
能够处理多数动态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。可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--create declare
create_table varchar2(200);
begin
create_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---alter declare
alter_table varchar2(200);
begin
alter_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---drop declare
drop_table varchar2(200);
begin
drop_table:='drop table ' ||'&target_table_name';
execute immediate drop_table ;
end; --案例04：使用execute immediate处理DDL语句--drop table create or replace procedure drop_table (table_name varchar2)
is
sql_sta varchar2(200);
begin
sql_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+select
declare
select_sta varchar2(200);
emp_rec emp%rowtype;
begin
execute 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，这个占位符是在引號内使用的*/
end; ---------------------------------------------------------
1.2 使用execute immediate处理DCL语句
---------------------------------------------------------- --案例01:使用execute immediate处理DCL语句--grant create or replace procedure grant_priv(priv varchar2, username varchar2)
is
priv_stat varchar2(200);
begin
priv_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--revoke create or replace procedure revoke_priv(priv varchar2, username varchar2)
is
priv_stat varchar2(200);
begin
priv_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:select declare
sql_stat varchar2(100);
begin
sql_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--insert
declare
insert_table varchar2(200);
begin
insert_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--update
declare
update_table varchar2(200);
begin
update_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--delete
declare
delete_table varchar2(200);
begin
delete_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+insert declare
create_table varchar2(200);
begin
create_table:='create table &table_name(sid int, sno int)';
execute immediate create_table ;
end; declare
insert_table varchar2(200);
begin
insert_table:='insert into &table_name values (&sid, &sno)';
execute immediate insert_table;
end; --案例06：同一时候实现新建一个表并插入数据--create+insert declare
create_table varchar2(200);
insert_table varchar2(200);
begin
create_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：同一时候实现新建一个表并插入数据--create+insert+update
/*
这里也能够分开写 */ declare
create_table varchar2(200);
insert_table varchar2(200);
update_table varchar2(200);
begin
create_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：同一时候实现新建一个表并插入数据--create+insert+update+delete
declare
create_table varchar2(200);
insert_table varchar2(200);
update_table varchar2(200);
delete_table varchar2(200);
begin
create_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：同一时候实现新建一个表并插入数据--create+insert+update+delete+insert
declare
create_table varchar2(200);
insert_table varchar2(200);
update_table varchar2(200);
delete_table varchar2(200);
re_insert_table varchar2(200);
begin
create_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+insert
declare
create_table varchar2(200);
insert_table varchar2(200);
begin
create_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_update
declare
create_table varchar2(200);
insert_table varchar2(200);
update_table varchar2(200);
begin
create_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; ---or
declare
create_table varchar2(200);
insert_table varchar2(200);
update_table varchar2(200);
begin
create_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+delete declare
create_table varchar2(200);
insert_table varchar2(200);
update_table varchar2(200);
delete_table varchar2(200);
begin
create_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; ---运行过程：
SQL> declare
2 create_table varchar2(200);
3 insert_table varchar2(200);
4 update_table varchar2(200);
5 delete_table varchar2(200);
6 begin
7 create_table:='create table &table_name (sid int, sno int)';
8 execute immediate create_table ;
9
10 insert_table:='insert into &target_table_name values (:sid, :sno)';
11 execute immediate insert_table using &1,&2;
12
13 update_table:='update &update_tablename set &update_column_name=:new_value
where &update_condition_column=:delete_condition_column_value ';
14 execute immediate update_table using &3 ,&4;
15
16 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_conditi
on_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_c
olumn=:delete_condition_column_value';
新值 16: delete_table:='delete from sz where sno=:delete_condition_column_valu
e';
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 过程已成功完毕。 SQL> select * from sz; 未选定行 3.处理包括returning子句的DML语句 --案例01：处理包括returning子句的DML语句--create+insert+update
declare
create_table varchar2(200);
insert_table varchar2(200);
update_table varchar2(200);
res varchar2(100);
begin
create_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,&4
returning into res;
dbms_output.put_line('the result is : ' ||res);
end;