我如何摆脱在select语句输出中超过我的属性长度的剩余破折号？

Question

SPOOL IT2T2SolutionOutputNN.txt
SET ECHO ON
SET FEEDBACK ON
SET LINESIZE 100
SET LINE 132
SET PAGESIZE 200
SET SERVEROUTPUT ON

create or replace procedure numberOfSupplier(X IN NUMBER) 
IS
supplierDetails SYS_REFCURSOR;
begin 

   open supplierDetails for
   select R_NAME, N_NAME, COUNT(S_NATIONKEY)
   from supplier
   inner join nation on supplier.s_nationkey = nation.n_nationkey
   inner join region on nation.n_regionkey = region.r_regionkey
   group by R_NAME, N_NAME
   having COUNT(S_NATIONKEY) > X;
   DBMS_SQL.RETURN_RESULT(supplierDetails);

end numberOfSupplier;
/
columns clear
execute numberOfSupplier(130)



SPOOL OFF

输出为：

ResultSet #1

R_NAME                    N_NAME                    COUNT(S_NATIONKEY)
------------------------- ------------------------- ------------------
ASIA                      INDONESIA                                131
ASIA                      CHINA                                    145
MIDDLE EAST               SAUDI ARABIA                             132
EUROPE                    GERMANY                                  132

4 rows selected.

我正在尝试将每一行中的值居中，所以我将lpad函数添加到属性“ COUNT（S_NATIONKEY）”：

select R_NAME, N_NAME, LPAD(COUNT(S_NATIONKEY), 10) as "COUNT(S_NATIONKEY)" etc...

它变成：

ResultSet #1

R_NAME                    N_NAME                    COUNT(S_NATIONKEY)
------------------------- ------------------------- ----------------------------------------
ASIA                      INDONESIA                        131
ASIA                      CHINA                            145
MIDDLE EAST               SAUDI ARABIA                     132
EUROPE                    GERMANY                          132

4 rows selected.

可以帮我摆脱“ COUNT（S_NATIONKEY）”后面的破折号吗？

Answer 1

为该表达式指定别名：

select (...), COUNT(S_NATIONKEY) as number_of_nationkeys

然后，在运行查询之前，将列的格式设置为（您写的所有SET中的形式为]

col number_of_nationkeys format 99999999999999999999

（9的数字表示“ number_of_nationkeys”中的字符数）。当然，如果您使用较短的别名，例如，它将看起来更漂亮。 cnt_nat;然后您会col cnt_nat format 9999999。

但是，总的来说，那是如何。