组合和连接两个具有不同编号的表。 列数和相同的列名
我尝试将fus_shift和根表合并到一个新表最终表中,但它的输出类似于“第2行错误: ORA-01789:查询块的结果列数不正确”。我也尝试加入表作为替代方案,但它也输出“第 3 行错误:ORA-00918:列定义不明确 ”。是否有另一种方法可以组合和连接两个具有不同列数且分别具有相同列名的表?再次感谢:-)
代码错误:
创建表最终为
从fus_shift中选择*
工会
select * from root;
代码错误:
选择记录号、测试号、t_date、t_time、system_type、类别、评论、val
来自fus_shiftrpt,根
其中 record_num=record_num;
我的表格:
fus_shift Table
Record_Num test date time system
-----------------------------------------------------------
1 test15 08-11-12 13:20:01 sys23
2 test17 08-11-03 14:24:00 sys24
3 test13 08-11-13 17:25:04 sys45
4 test15 08-11-14 18:24:00 sys67
5 test16 08-11-15 19:24:06 sys45
root Table
Record_Num category comments validated by
---------------------------------------------------
1 dirt checked admin
2 prog checked admin
3 dirt checked pe
4 wires checked ee
5 prog repair admin
强调文本
I tried to combined tables which is fus_shift and root table into a new table which is final table but it outputs like "ERROR at line 2:
ORA-01789: query block has incorrect number of result columns". I tried also joining table as my alternative but it also outputs "ERROR at line 3: ORA-00918: column ambiguously defined". Is there another way to do combining and joining two table with different number of columns and having the same column name respectively? Thanks again:-)
code error:
create table final as
select * from fus_shift
union
select * from root;
code error:
select record_num,test_num,t_date,t_time,system_type,category,comments,val
from fus_shiftrpt,root
where record_num=record_num;
my tables:
fus_shift Table
Record_Num test date time system
-----------------------------------------------------------
1 test15 08-11-12 13:20:01 sys23
2 test17 08-11-03 14:24:00 sys24
3 test13 08-11-13 17:25:04 sys45
4 test15 08-11-14 18:24:00 sys67
5 test16 08-11-15 19:24:06 sys45
root Table
Record_Num category comments validated by
---------------------------------------------------
1 dirt checked admin
2 prog checked admin
3 dirt checked pe
4 wires checked ee
5 prog repair admin
emphasized text
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您当然不能将“Union”应用于您的表。 仅当两个查询返回相同数量(且类型相似)的列时才可以应用它。
您可以连接两个表,但在连接时必须使用“表别名”,因为“record_num”字段在两个表中都很常见。 这是适合您的查询
You certainly cannot apply "Union" to your tables. It can be applied only if both queries return same number (and of similar type) of columns.
You can join the two tables but would have to use "table alias" while joining since "record_num" field is common in both the tables. Here is the query that would work for you
我会使用以下方法:
I would use the following method: