如何存储ORACLE sql查询的结果集？

Question

实施例：有一个表“ID_NAME”与一列“ID”，其具有2000个条目等1,2,3 .. 2000 我已经有一个查询从ID_NAME其中id

选择ID < 1001;

> Result : 1 2 3 4 . .1000 

我的PL SQL块看起来是这样的，

SET SERVEROUTPUT ON; 
    declare 
    var1 number; 
    var2 number; 
    var3 number; 
    var4 number; 
    var5 number; 
    var6 number; 
    var7 number; 
    var8 number; 
    var9 number; 
    var10 number; 
    begin 
    with set1 as (select id from ID_NAME where id < 1001) 
    select count(*) into var1 from table1 where id in (select * from set1); 
    select count(*) into var2 from table2 where id in (select * from set1); 
    select count(*) into var3 from table3 where id in (select * from set1); 
    select count(*) into var4 from table4 where id in (select * from set1); 
    select count(*) into var5 from table5 where id in (select * from set1); 
    select count(*) into var6 from table6 where id in (select * from set1); 
    select count(*) into var7 from table7 where id in (select * from set1); 
    select count(*) into var8 from table8 where id in (select * from set1); 
    select count(*) into var9 from table9 where id in (select * from set1); 
    select count(*) into var10 from table10 where id in (select * from set1); 
DBMS_OUTPUT.PUT_LINE('var1,var2,var3,var4,var5,var6,var7,var8,var9,var10'); 
DBMS_OUTPUT.PUT_LINE(var1||','||var2||','||var3||','||var4||','||var5||','||var6||','||var7||','||var8||','||var9||','||var10); 
end; 

，但我发现

PL/SQL：ORA-00942：表或视图不存在

在我的SQL开发人员。

我想用SET1从我下面的查询，这样我就不必在计数一次又一次地运行它（*）子查询

with set1 as (select id from ID_NAME where id < 1001) 

Answer 1

你正在建设一个CTE如此这般像这样：对于每个选择语句你需要加入CTE。

declare 
    var1 number; 
    var2 number; 
    var3 number; 
    var4 number; 
    var5 number; 
    var6 number; 
    var7 number; 
    var8 number; 
    var9 number; 
    var10 number; 
    begin 
    with set1 as (select emp_id from employee where emp_id < 1001) 
    select count(*) into var1 from employee 
    where emp_id in (select eno from emp_sal); 

    with set1 as (select emp_id from employee where emp_id < 1001) 
    select count(*) into var2 from employee 
    where emp_id in (select eno from emp_sal); 


    . 
    . 
    . 
    . 
    and so on 
-- select count(*) into var2 from table2 where id in (select * from set1); 
-- select count(*) into var3 from table3 where id in (select * from set1); 
-- select count(*) into var4 from table4 where id in (select * from set1); 
-- select count(*) into var5 from table5 where id in (select * from set1); 
-- select count(*) into var6 from table6 where id in (select * from set1); 
-- select count(*) into var7 from table7 where id in (select * from set1); 
-- select count(*) into var8 from table8 where id in (select * from set1); 
-- select count(*) into var9 from table9 where id in (select * from set1); 
-- select count(*) into var10 from table10 where id in (select * from set1); 
DBMS_OUTPUT.PUT_LINE('var1,var2,var3,var4,var5,var6,var7,var8,var9,var10'); 
DBMS_OUTPUT.PUT_LINE(var1||','||var2||','||var3||','||var4||','||var5||','||var6||','||var7||','||var8||','||var9||','||var10); 
end; 

Answer 2

在SQL中，with子句或公用表表达式是查询的一部分。它不设置程序变量。

with xyz as (select blah from blahblah where something = somethingelse) 
select blah from xyz; 

您不能在其他查询中引用xyz - 它只是单个查询中的一个子句。

Answer 3

SET SERVEROUTPUT ON; 
    declare 
    var1 number; 
    var2 number; 
    var3 number; 
    var4 number; 
    var5 number; 
    var6 number; 
    var7 number; 
    var8 number; 
    var9 number; 
    var10 number; 
    begin 
    with set1 as (select id from ID_NAME where id < 1001) 
    select 
    (select count(*) from table1 where id in (select * from set1)), 
    (select count(*) from table2 where id in (select * from set1)), 
    .............. 
    (select count(*) from table9 where id in (select * from set1)), 
    (select count(*) from table10 where id in (select * from set1)) 
    into var1,var2,.....,var9,var10 
    from dual; 
DBMS_OUTPUT.PUT_LINE('var1,var2,var3,var4,var5,var6,var7,var8,var9,var10'); 
DBMS_OUTPUT.PUT_LINE(var1||','||var2||','||var3||','||var4||','||var5||','||var6||','||var7||','||var8||','||var9||','||var10); 
end;