Question

示例：有一张表＆＃34; ID_NAME＆＃34;一列＆＃34; ID＆＃34;它有2000个条目，如1,2,3 .. 2000。我有查询

从ID_NAME中选择ID，其中id＆lt; 1001;

> Result :  1 2 3 4 . .1000

我的PL SQL块看起来像这样，

 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;

但我正在

PL / SQL：ORA-00942：表或视图不存在

在我的sql开发人员中。

我想从下面的查询中使用SET1，这样我就不必在count（*）子查询中再次运行它

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

Answer 1

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;

Answer 2

您正在构建一个CTE，所以它是这样的：对于每个select语句，您需要加入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 3

在SQL中，with子句或公用表表达式是查询的一部分。它没有设置程序变量。

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

您无法在其他查询中引用xyz - 它只是单个查询中的一个子句。

如何存储ORACLE sql查询的结果集？

3 个答案: