[英]Oracle sql adding custom column name as 1st row of the resultSet
如何將列名作為結果集的第一行。我在下面嘗試但得到如下所示的錯誤
select 'First Name', 'Last Name', 'Middle Name', 'Term Number', 'BID', 'BTitle', 'SubB Name', 'LNum' from dual
UNION
select
pa.first_name as first_name,
pa.last_name as last_name,
pa.MIDDLE_INITIAL as middle_name,
bi.bi_num as num,
bi.b_id as bId,
b.name as b_title,
bi.sub_board_name as sub_b_name,
pa.L_NUMBER as lNum
from
M_INFO pa,
B_INV bi,
Blot b,
users u,
roles r
where
bi.assigned_to = u.bi_num(+)
and bi.bi_num = pa.bi_num(+)
and u.role_id = r.id(+)
and bi.b_id = b.id
and bi.delete_dt is null
and bi.delete_by is null
and bi.ARCHIVED_DT is null
and bi.b_id = '40' and bi.sub_b_name = 'TEST';
ORA-01790: expression must have same datatype as corresponding expression
01790. 00000 - "expression must have same datatype as corresponding expression"
*Cause:
*Action:
Error at Line: 1 Column: 50
我建議對您的查詢進行兩項更改。
UNION
到UNION ALL
。 這樣您的聯合就不會在聯合的兩個部分之間尋找重復項。bi.bi_num
更改為TO_CHAR(bi.bi_num)
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