I have to select requests that i want to combine using UNION :
Table 1 : which is a join between Table_a, table_b and table_c
id_table_a desc_table_a table_b.id_user table_c.field
-----------------------------------------------------------
1 desc1 1 field1
2 desc2 2 field2
3 desc3 3 field3
Table 2 : which is also a join between Table_a, table_b and table_c but it has these columns:
id_table_a desc_table_a table_c.id_user table_c.field
-----------------------------------------------------------
4 desc4 4 field4
5 desc5 5 field8
9 desc9 6 field9
the difference between the two is that in Table1 we have table_b.id_user and table two
table_c.id_user instead .
Combined Table
id_table_a desc_table_a id_user table_c.field
-----------------------------------------------------------
1 desc1 1 field1
2 desc2 2 field2
3 desc3 3 field3
4 desc4 4 field4
5 desc5 5 field5
9 desc9 6 field6
I already have the join requests working but doing union between the two gives me
ORA-01790 expression must have same datatype as corresponding expression
which make sense because the two columns are not the same .
Im using zend_Db's join and union for this .
So how can i tackle this to get the result ?
Thanks.
Are the results above the same as the sequence of columns in your table? because oracle is strict in column orders. this example below produces an error:
create table test1_1790 (
col_a varchar2(30),
col_b number,
col_c date);
create table test2_1790 (
col_a varchar2(30),
col_c date,
col_b number);
select * from test1_1790
union all
select * from test2_1790;
ORA-01790: expression must have same datatype as corresponding expression
As you see the root cause of the error is in the mismatching column ordering that is implied by the use of * as column list specifier. This type of errors can be easily avoided by entering the column list explicitly:
select col_a, col_b, col_c from test1_1790
union all
select col_a, col_b, col_c from test2_1790;
A more frequent scenario for this error is when you inadvertently swap (or shift) two or more columns in the SELECT list:
select col_a, col_b, col_c from test1_1790
union all
select col_a, col_c, col_b from test2_1790;
OR if the above does not solve your problem, how about creating an ALIAS in the columns
like this: (the query is not the same as yours but the point here is how to add alias in the column.)
SELECT id_table_a,
desc_table_a,
table_b.id_user as iUserID,
table_c.field as iField
UNION
SELECT id_table_a,
desc_table_a,
table_c.id_user as iUserID,
table_c.field as iField
hope this helps.
Related
I have two tables Table1 and Table2 both with the same columns TestResult and Testcounts. Table1 has testresult as varchar and Table2 has testresult as number.
I have a string .for eg "Oracle" as value for testresult of varchar type for Table1 which needs to be inserted to testresult of number type of Table2 as null.How can i do this? Any suggestions will be highly appreciated :)
EDIT
I have table1 with columns as TestResult varchar2(50) and Testcount number with values as "0.5","0.6","0.8","Oracle" for TestResult and 1,2,3,4 for Testcount.
Now i have another table Table2 as TestResult number and Testcount number with no values, in other words its empty.. I would like to insert all data from table1 to table2 with "Oracle" being inserted as "null"
The following will do what you've asked for:
INSERT INTO TABLE2 (TESTRESULT, TESTCOUNTS)
SELECT CASE
WHEN LENGTH(REGEXP_SUBSTR(TESTRESULT, '[0-9.]*')) = LENGTH(TESTRESULT) THEN TESTRESULT
ELSE NULL
END,
TESTCOUNTS
FROM TABLE1
SQLFiddle here
If you only have a single string value that you can't convert to a number, and you want to set that to null, you can just use a case expression to supply the null:
insert into table2 (testresult, testcounts)
select case when testresult = 'Oracle' then null else to_number(testresult) end,
testcounts
from table1;
Demo:
create table table1 (testresult varchar2(10), testcounts number);
insert into table1
select '0.5', 1 from dual
union all select '0.6', 2 from dual
union all select '0.8', 3 from dual
union all select 'Oracle', 4 from dual;
create table table2 (testresult number, testcounts number);
insert into table2 (testresult, testcounts)
select case when testresult = 'Oracle' then null else to_number(testresult) end,
testcounts
from table1;
select * from table2;
TESTRESULT TESTCOUNTS
---------- ----------
.5 1
.6 2
.8 3
4
db<>fiddle
If you are using Oracle 12c Release 2 (or above) you could also just try to convert the string to a number and use the default ... on conversion error clause to substitute null for that, or any other, non-numeric value:
insert into table2 (testresult, testcounts)
select to_number(testresult default null on conversion error), testcounts
from table1;
select * from table2;
TESTRESULT TESTCOUNTS
---------- ----------
.5 1
.6 2
.8 3
4
In earlier versions you could do the same thing with a user-defined function that wraps the real to_number() call and returns null on error. Or a regex/translate check similar to what #BobJarvis has shown.
Having multiple rows with null would make the data hard to interpret though, so hopefully you only have this one fixed value...
Please read only EDIT section which is more relevant now.
I have table in oracle 12c database, say table_1.
I have to run a simple SQL which returns only 1 row and all columns from from table_1. Say like
select * from table_1 where col_1 = 65
But the result I want is like:
I did some search and found this link which is very similar to what i want.
But I was only able to get the first column in the expected result by folowing it. I am unable to get actual data in the second column of the expected result.
So far I was able to write only:
select v
from (
select 'col_1' as col_1, 'col_2' as col_2, 'col_3' as col_3, 'col_4' as col_4 from dual
) t
unpivot
(
v for val in (col_1,col_2,col_3,col_4)
) u;
How can I add the second column and the condition where col_1 = 65?
EDIT: (Above part is less relevant now)
I fount this link where there us unpivot example which I could use.
select * from olympic_medal_tables
Gives:
desc olympic_medal_tables
Name Null? Type
------------- ----- -----------
NOC VARCHAR2(3)
GOLD_MEDALS NUMBER
SILVER_MEDALS NUMBER
BRONZE_MEDALS NUMBER
Following SQL gives me what I could use, but I don't want the NOC column in the result:
select * from olympic_medal_tables
unpivot (medal_count for medal_colour in (
gold_medals as 'GOLD',
silver_medals as 'SILVER',
bronze_medals as 'BRONZE'
));
Result:
So when I add NOC as well (so it is not added as a column in the result) like:
select * from olympic_medal_tables
unpivot (medal_count for medal_colour in (
gold_medals as 'GOLD',
silver_medals as 'SILVER',
bronze_medals as 'BRONZE',
noc as 'NOC'
));
I get error: ORA-01790: expression must have same datatype as corresponding expression on line 6 Error at Line: 44 Column: 3
I have tried using TO_NUMBER and TO_CHAR as well but then I get various syntax errors.
Question: How can I get expected result with just 2 columns. Is it possible with this approach using unpivot?
Here's one option, which requires you to first select one row, and then apply UNPIVOT to it:
SQL> with test (col1, col2, col3, col4) as
2 (select '12', 'hfkds' , 'hk435k' , '32' from dual union
3 select '34', 'ldkfgj', 'fsjd4653', '324' from dual union
4 select '65', 'ifd' , 'dkfjs345', '23' from dual union
5 select '87', 'dg' , '345jh' , '65' from dual
6 ),
7 one_row as
8 (select * From test
9 where col1 = '65'
10 )
11 select *
12 from one_row
13 unpivot (col_value for col_name in
14 (col1 as 'col1', col2 as 'col2', col3 as 'col3', col4 as 'col4'));
COL_ COL_VALU
---- --------
col1 65
col2 ifd
col3 dkfjs345
col4 23
SQL>
I have a table with three columns.
I query that table with IN clause.
select column1 from table1 where column1 in (1,2,3) order by column2, column3
The table1 contains only values 1 and 2 in column1. I want to return the not available value also in my result, and that should be sorted in the bottom.
example data
column1 column 2 column 3
1 100 11
2 101 50
output, the not available values should be in the last.
column1 column 2 column 3
1 100 11
2 101 50
3 null null
I tried with subquery with NVL, like select nvl((select.. in(1,2,3)),null) from dual, due to IN Clause, I am getting single row subquery returns more than one row issue, which is expected.
Also tried with the union but nothing works. Great if any help. Thanks
I think you can do it with a union all:
select column1 from table1 where column1 in (1,2,3) order by column2, column3
union all
select null from table1 where column1 not in (1,2,3) order by column2, column3
If you can't take 1,2,3 values from another table you can try with:
with t1 as (
select col1,col2,col3
from tab1
where cod_flusso in ('1','2','3')),
t2 as (
select '1' as col1,null,null
from dual
union
select '2',null,null
from dual
union
select '3',null,null
from dual)
select t2.col1,col2,col3
from t2
left outer join t1
on t1.col1= t2.col1
It's better if you can store 1,2,3 values in a second table, then use left outer join.
I have an Oracle table I've compiled using an Informatica workflow. It's failing an integrity check because the following queries return a different number of rows:
SELECT DISTINCT * FROM table // 4,000 rows
SELECT * FROM table // 4,006 rows
The table consists of 17 fields, none of which are unique keys (obviously). How can I find the 6 duplicate rows?
For returning duplicate rows.
select * from
(SELECT cd.*,
ROW_NUMBER ()
OVER (PARTITION BY column1,column2...column2
ORDER BY column_names)
seq_no
FROM table cd)
where seq_no>1;
For example i have create one sample_table below for your better understanding.
create table sample_table
(
id1 number,
id2 number
)
i have inserted below data into table
ID1 ID2
1 2
1 2
1 2
2 3
2 3
2 3
In above data set we have 6 rows but only two rows are distinct.
By using below queries we can get distinct rows and non-distinct rows.
SELECT cd.*,
ROW_NUMBER ()
OVER (PARTITION BY id1
ORDER BY id1)
seq_no
FROM sample_table cd
after partition the table with the help of id1 we will get the below results
ID1 ID2 SEQ_NO
1 2 1
1 2 2
1 2 3
2 3 1
2 3 2
2 3 3
Then if you want to see the distinct rows use below query
select * from
(SELECT cd.*,
ROW_NUMBER ()
OVER (PARTITION BY id1
ORDER BY id1)
seq_no
FROM sample_table cd)
where seq_no=1;
if you want to see duplicate set use below query
select * from
(SELECT cd.*,
ROW_NUMBER ()
OVER (PARTITION BY id1
ORDER BY id1)
seq_no
FROM sample_table cd)
where seq_no>1;
A posibiliy is to use a analytical function to count the rows in the same group and I don't see how you can write the query without writing all the columns in some clause:
select *
from (
Select a.*, count(*) over (partition by column1, column2, ..., column17) as cnt
from your_table a
)
where cnt>1
This should get 12 rows, because 6 are duplicated.
A basic sql query would be:
select col1, col2, ..., col17
from table
group by col1, col2, ..., col17
having count(*) > 1;
I am new to Oracle technology. Earlier I posted 2 posts for the same issue due to lack of understanding the requirement.
Table 1:
MSGID
-----
1,2,3
2,3
4
null
null
Table 2:
MID MSGDESC
---- -------
1 ONE
2 TWO
3 THREE
4 FOUR
Expected output:
XCOL DESC
----- -----
1,2,3 ONE,TWO,THREE
2,3 TWO,THREE
4 FOUR
I am not able to fulfil this requirement. Please provide me one solution.
Note: tables don't have any unique or primary key values. Table 1 has 5000 records and table 2 only has 80 records with descriptions.
create table Table1 (MSGID varchar2(100));
insert into Table1 values ('1,2,3');
insert into Table1 values ('2,3');
insert into Table1 values ('4');
insert into Table1 values (null);
insert into Table1 values (null);
create table Table2 (MID varchar2(100), MSGDESC varchar2(100));
insert into Table2 values ('1','ONE');
insert into Table2 values ('2','TWO');
insert into Table2 values ('3','THREE');
insert into Table2 values ('4','FOUR');
select
msgid as xcol,
"DESC",
col1, col2, ..., col12
from
Table1
left join (
select
msgid,
wm_concat(msgdesc) as "DESC"
from
(
select
msgid,
msgdesc
from
(select distinct msgid from Table1 where ...)
cross join (
select level as occ from dual connect by level <= 100)
)
left join Table2
on mid = regexp_substr(msgid, '[^,]+', 1, occ)
where
occ <= regexp_count(msgid, ',') + 1
order by msgid, occ
)
group by msgid
) using (msgid)