Question

我正在努力学习一些oracle sql语法。（我习惯了sql server）。

我尝试使用变量存储值以便稍后再次使用该值。

然而在变量块中显然我需要进行select into查询（对我来说很奇怪），我无法获得屏幕输出。

我设法使用临时表编写以下查询：

CREATE GLOBAL TEMPORARY TABLE temp
    (leeftijd varchar(30),
     aantal number,
     aantalProcentueel number)
  ON COMMIT DELETE ROWS;

declare 
  aantalLeden number;
begin
  select count(*) into :aantalLeden
  FROM dbcmnu_all
  WHERE     DBCMNU_ALL.ZF_VP='105' AND DBCMNU_ALL.BEGIN_ZF_VP <= sysdate AND 
          (DBCMNU_ALL.EIND_ZF_VP >= sysdate Or DBCMNU_ALL.EIND_ZF_VP Is Null) 
          AND DBCMNU_ALL.DATDEC Is Null;

select case
    when rijksnummer is null then 'ongeldig'
    when length(rijksnummer) < 6 then 'ongeldig'
    when substr(rijksnummer, 5, 2) <= 0 or  substr(rijksnummer, 5, 2) > 12 then 'ongeldig'
    when months_between(TRUNC(sysdate),to_date(substr(rijksnummer, 1, 8), 'YYYYMMDD'))/12 between 0 and 9.99 then '0-9'
    when months_between(TRUNC(sysdate),to_date(substr(rijksnummer, 1, 8), 'YYYYMMDD'))/12 between 10 and 19.99 then '10-19'
    when months_between(TRUNC(sysdate),to_date(substr(rijksnummer, 1, 8), 'YYYYMMDD'))/12 between 20 and 29.99 then '20-29'
    when months_between(TRUNC(sysdate),to_date(substr(rijksnummer, 1, 8), 'YYYYMMDD'))/12 between 30 and 39.99 then '30-39'
    when months_between(TRUNC(sysdate),to_date(substr(rijksnummer, 1, 8), 'YYYYMMDD'))/12 between 40 and 49.99 then '40-49'
    when months_between(TRUNC(sysdate),to_date(substr(rijksnummer, 1, 8), 'YYYYMMDD'))/12 between 50 and 59.99 then '50-59'
    when months_between(TRUNC(sysdate),to_date(substr(rijksnummer, 1, 8), 'YYYYMMDD'))/12 between 60 and 69.99 then '60-69'
    when months_between(TRUNC(sysdate),to_date(substr(rijksnummer, 1, 8), 'YYYYMMDD'))/12 between 70 and 79.99 then '70-79'
    when months_between(TRUNC(sysdate),to_date(substr(rijksnummer, 1, 8), 'YYYYMMDD'))/12 between 80 and 89.99 then '80-89'
    when months_between(TRUNC(sysdate),to_date(substr(rijksnummer, 1, 8), 'YYYYMMDD'))/12 between 90 and 99.99 then '90-99'
    when months_between(TRUNC(sysdate),to_date(substr(rijksnummer, 1, 8), 'YYYYMMDD'))/12 >=  100              then '100+'
  end as leeftijd
  , count(*) as aantal
  into temp
FROM dbcmnu_all
WHERE   DBCMNU_ALL.ZF_VP='105' AND DBCMNU_ALL.BEGIN_ZF_VP <= sysdate AND 
        (DBCMNU_ALL.EIND_ZF_VP >= sysdate Or DBCMNU_ALL.EIND_ZF_VP Is Null) 
        AND DBCMNU_ALL.DATDEC Is Null

  group by
  case
    when rijksnummer is null then 'ongeldig'
    when length(rijksnummer) < 6 then 'ongeldig'
    when substr(rijksnummer, 5, 2) <= 0 or  substr(rijksnummer, 5, 2) > 12 then 'ongeldig'
    when months_between(TRUNC(sysdate),to_date(substr(rijksnummer, 1, 8), 'YYYYMMDD'))/12 between 0 and 9.99 then '0-9'
    when months_between(TRUNC(sysdate),to_date(substr(rijksnummer, 1, 8), 'YYYYMMDD'))/12 between 10 and 19.99 then '10-19'
    when months_between(TRUNC(sysdate),to_date(substr(rijksnummer, 1, 8), 'YYYYMMDD'))/12 between 20 and 29.99 then '20-29'
    when months_between(TRUNC(sysdate),to_date(substr(rijksnummer, 1, 8), 'YYYYMMDD'))/12 between 30 and 39.99 then '30-39'
    when months_between(TRUNC(sysdate),to_date(substr(rijksnummer, 1, 8), 'YYYYMMDD'))/12 between 40 and 49.99 then '40-49'
    when months_between(TRUNC(sysdate),to_date(substr(rijksnummer, 1, 8), 'YYYYMMDD'))/12 between 50 and 59.99 then '50-59'
    when months_between(TRUNC(sysdate),to_date(substr(rijksnummer, 1, 8), 'YYYYMMDD'))/12 between 60 and 69.99 then '60-69'
    when months_between(TRUNC(sysdate),to_date(substr(rijksnummer, 1, 8), 'YYYYMMDD'))/12 between 70 and 79.99 then '70-79'
    when months_between(TRUNC(sysdate),to_date(substr(rijksnummer, 1, 8), 'YYYYMMDD'))/12 between 80 and 89.99 then '80-89'
    when months_between(TRUNC(sysdate),to_date(substr(rijksnummer, 1, 8), 'YYYYMMDD'))/12 between 90 and 99.99 then '90-99'
    when months_between(TRUNC(sysdate),to_date(substr(rijksnummer, 1, 8), 'YYYYMMDD'))/12 >=  100              then '100+'
  end
  order by leeftijd;


end;

select leetijd, aantal, aantalProcentueel
 from temp;

此查询失败，说：PLS-00103：遇到符号“SELECT”

现在如何在oracle sql中声明变量并在sql语句中稍后使用该变量？（我想添加一个列blabla / variable作为columnname

如果可能的话，我也想在屏幕上输出一个......

Answer 1

PLS-00103是因为PL / SQL解析器试图将select解释为块流的一部分，并且在那里无效。您需要使用/：

终止并执行块

declare 
  aantalLeden number;
begin
  ...
end;
/

select leetijd, aantal, aantalProcentueel
 from temp;

@a_horse_with_no_name是对的，你应该做insert into，而不是select into; @YaroslavShabalin对你的额外冒号是正确的，因为aantalLeden是一个本地PL / SQL变量，而不是绑定变量：

select count(*) into aantalLeden
FROM dbcmnu_all
WHERE   DBCMNU_ALL.ZF_VP='105' AND DBCMNU_ALL.BEGIN_ZF_VP <= sysdate AND 
        (DBCMNU_ALL.EIND_ZF_VP >= sysdate Or DBCMNU_ALL.EIND_ZF_VP Is Null) 
        AND DBCMNU_ALL.DATDEC Is Null;

insert into temp (leeftijd, aantal number)
select case
    ...
  end as leeftijd
  , count(*) as aantal
from ...
group by ...;

在用于插入的选择中有一个order by子句没什么意义。我不确定你打算用你的aantalLeden值做什么;目前尚不清楚是否要将aantalProcentueel值设置为所有行的值。

你可能根本不想要一个临时表，这取决于你接下来要做什么。

oracle中的变量和多个select语句

1 个答案: