I have two table with the same columns in different databases. Both table have records.i want to insert the records of table2 in table1 but i want to ignore those records which are already in table 1. As well i want to store all ignored records in a new table.
Example:
create table dest
(id number primary key,
col1 varchar2(10));
create table src
(id number,
col1 varchar2(10));
insert into src values(1,'ABC');
insert into src values(2,'GHB');
insert into src values(3,'DUP');
insert into src values(3,'DUP');
commit;
merge into dest
using
(select id,col1 from src) src on(dest.id=src.id)
when not matched then
insert values(src.id,src.col1)
when matched
then update set dest.col1=src.col1;
Error report -
SQL Error: ORA-00001: unique constraint (SCOTT.SYS_C0010807) violated
00001. 00000 - "unique constraint (%s.%s) violated"
*Cause: An UPDATE or INSERT statement attempted to insert a duplicate key.
For Trusted Oracle configured in DBMS MAC mode, you may see
this message if a duplicate entry exists at a different level.
*Action: Either remove the unique restriction or do not insert the key.
you can use intersect and minus to determine the differences
-- Test Data
-- table1#abc
with data1(id,
val) as
(select 1, 'val1'
from dual
union all
select 2, 'val2'
from dual
union all
select 3, 'val3'
from dual),
-- table2#xyz
data2(id,
val) as
(select 1, 'another val1'
from dual
union all
select 2, 'val2'
from dual
union all
select 4, 'val4'
from dual)
-- Intersection
select 'Intersection', intersection.*
from ((select * from data2) intersect (select * from data1)) intersection
union all
-- data2 not in data1
select 'data2 not in data1', d2.*
from ((select * from data2) minus (select * from data1)) d2
union all
-- data1 not in data2
select 'data1 not in datad', d1.*
from ((select * from data1) minus (select * from data2)) d1;
Related
Wondering if there is a way to insert a row into a table from another, with exception of one column in the middle without specifying all the column name? I have 128 columns in the table.
I created a view to store the original records.
CREATE VIEW V_TXN_STG AS
SELECT * FROM TXN_STG;
In table TXN_STG, only one column BRN_CODE is changing.
Something like this doesn't work, because the column is not on the last, but somewhere middle of table structure.
INSERT INTO TXN_STG
SELECT v.*, 'BRN-001' AS BRN_CODE
FROM V_TXN_STG v;
I don't believe that this is possible without explicitly specifying the columns in your select.
first you have to get the columns:
SELECT listagg(column_name, ',') within group (order by column_name) columns
FROM all_tab_columns
WHERE table_name = 'AAA' --Table to insert too
and column_name <> 'B' -- column name you want to exclude
GROUP BY table_name;
Then insert that result on the first row:
insert into aaa(A,C) -- A,C is my result from above,I have excluded column B
select *
from (select 'a' A,'q' AMOUNT,'c' C from dual union all -- my sample data
select 'a','a','c' from dual union all
select 'a','b','c' from dual union all
select 'a','c','c' from dual union all
select 'a','d','c' from dual )
pivot
(
max(1)
for (AMOUNT) -- the column you want to remove from the sample data
IN ()
)
where 1=1
order by A;
I've got a table as follows
Table1
ID Name Tag
-----------------
1 N1 2.1
2 N2 3.5
3 N1 3.5
4 N3 8.1
I create a new table Table2 with ID and Name (unique constraint) and I want to insert Table1's contents into Table2 avoiding duplicates, in the sense that I want only 1, 2 and 4 from Table1 in Table2.
I've tried this but it doesn't seem to work and I get the unique constraint error (ORACLE SQL)
INSERT INTO TABLE2 (ID, NAME)
SELECT ID, NAME
FROM TABLE1
WHERE NAME NOT IN (SELECT NAME FROM TABLE2);
Please can someone point me in the right direction?
Sorry for not making myself clear. Table2 is a brand new table. I want the first values inserted, the following duplicates should be ignored. So in my case, N1, N2 get inserted, N1 is dupe so it is ignored, N3 is inserted
OK - from your description, I understand table t2 is currently empty, and you want to copy the rows where id is in (1, 2, 4) from table t1 to table t2.
Why your code fails:
You seem to believe that the condition is applied to the first row in t1, it passes so it is inserted into t2, then the condition is applied to the second row in t1 (using what is already inserted in t2), etc. - and you don't understand why there is any attempt to insert ALL the rows from t1 into t2. Why doesn't the third row fail the WHERE clause?
Good question! The reason is that operations are done on a SET basis. The WHERE condition uses table t2 AS IT WAS before the INSERT operation began. So for ALL rows, the WHERE clause compares to an empty table t2.
How to fix this... Decide which id you want to add when there are duplicate names. For example, one way to get the result you said you wanted is to select MIN(id) for each name. Moreover, you still want to check if the name exists in t2 already (since you may do this again in the future, when t2 is already partially populated).
insert into t2 ( id, name )
select min(id), name
from t1
where name not in (select name from t2)
group by name
;
You can try it bother....!
Insert into tb2(Field1, Field2)
SELECT Field1, Field2
FROM tb1
WHERE NOT EXISTS (SELECT Field1 FROM tb1) ;
This is how I understood the question:
SQL> create table table2
2 (id number,
3 name varchar2(2),
4 tag number,
5 constraint pk_t2 primary key (id, name)
6 );
Table created.
SQL>
SQL> insert into table2 (id, name, tag)
2 with test (id, name, tag) as
3 (select 1, 'N1', 2.1 from dual union
4 select 2, 'N2', 3.5 from dual union
5 select 3, 'N1', 3.5 from dual union
6 select 4, 'N3', 8.1 from dual
7 )
8 select min(id), name, max(tag)
9 from test
10 group by name;
3 rows created.
SQL>
SQL> select * from table2 order by id;
ID NA TAG
---------- -- ----------
1 N1 3,5
2 N2 3,5
4 N3 8,1
SQL>
When we need to unique any two or more column we have to create unique index.
Run this query
ALTER TABLE TABLE2 ADD UNIQUE unique_index( id, name);
and then
INSERT INTO TABLE2 (id,name,tag) VALUES(1, "N1", 3.5 )
ON DUPLICATE KEY UPDATE tag=3.5
this will also help to update new tag
Try to check if the id and name from Table1 is doesn't exist in Table2, if then insert.
If the unique constraint on TABLE2 is a composite key then run this:
INSERT INTO TABLE2 (ID, NAME)
SELECT A.ID, A.NAME
FROM TABLE1 A
WHERE NOT EXISTS (SELECT NULL FROM TABLE2 B WHERE A.ID=B.ID AND A.NAME=B.NAME);
If there are two unique constraints; one on the id, and the other on the name then run this instead:
INSERT INTO TABLE2 (ID, NAME)
SELECT A.ID, A.NAME
FROM TABLE1 A
WHERE NOT EXISTS (SELECT NULL FROM TABLE2 B WHERE A.ID=B.ID OR A.NAME=B.NAME);
ORACLE, in case you need to get values from 2 different tables.
below example,i use an increment case.
INSERT INTO TABLE1
(INDEX, REMARKS, NAME, AGE)
(SELECT (SELECT colescs(MAX(INDEX),0) FROM TABLE1)+1,
'any remarks',
t2.NAME, t2,age from TABLE2 t2 where t2.name = 'apple')
explanation
match below numbers (1)-(1), (2)-(2) ...
INSERT INTO TABLE1
(INDEX, //index increment (1)
REMARKS, //hard code (2)
NAME, //from table2 (3)
AGE) //from table2 (4)
(SELECT // this part is to get values from another table
(SELECT colescs(MAX(INDEX),0) FROM TABLE1)+1, //increment (1)
'any remarks', //hard code value (2)
t2.NAME, //from table2 (3)
t2,age //from table2 (4)
from TABLE2 t2 where t2.name = 'apple') //condition for table2
I am trying to join two tables together but the key in one table is formated like 'xxxxxx' and the key I am trying to join together in the second table is formated like '2222xxxxxx'. Is there a way I can either split the second column into two different columns to make the join, or join on only the last 6 numbers of column 2?
Notes: values are numeric. the '2222' is always the same 4 numbers.
Try this way:
select *
from table1 a
INNER JOIN table2 b
on a.fieldname = substr(b.fieldname, -6)
Here is the documentation for the SUBSTR Function in Oracle.
Know that this is a very bad design for your second table you should consider in separating this values in different columns.
EDIT
This comment from #Boneist "if there were 7 numbers after the first 4, not just 6?"
To fix this you should use: substr(b.fieldname, 5)
To separate that column on a select statement either you create a new column and update it values with the given substr or just add it in the select command.
On the select command:
select fielda, fieldb,
substr(b.fieldname, 1, 4) firstPartOfField,
substr(b.fieldname, 5) secondPartOfField
from tableb
To create another column it would be
alter table tableb add column newField number(6);
update tableb
set oldField = substr(b.fieldname,1,4),
newField = substr(b.fieldname,5);
I would suggest a slightly different approach:
If your column has varchar/char data type:
drop table tab1;
drop table tab2;
create table tab1(col char(30));
create table tab2(col char(30));
insert into tab1
select lpad(to_char(level), 6, '0') as val
from dual connect by level <=100 order by level;
insert into tab2
select '2222' || lpad(to_char(level), 6, '0') as val
from dual connect by level <=100 order by level;
create unique index ux_tab1 on tab1(col);
create unique index ux_tab2 on tab2(col);
select tab1.col, tab2.col
from tab1
join tab2
on '2222' || tab1.col = tab2.col;
-- check execution plan
explain plan for
select tab1.col, tab2.col
from tab1
join tab2
on '2222' || tab1.col = tab2.col;
select * from table(dbms_xplan.display);
If your column has number data type:
drop table tab1;
drop table tab2;
create table tab1(col number);
create table tab2(col number);
insert into tab1
select 100000 + level as val
from dual connect by level <=100 order by level;
insert into tab2
select 2222100000 + level as val
from dual connect by level <=100 order by level;
create unique index ux_tab1 on tab1(col);
create unique index ux_tab2 on tab2(col);
select tab1.col, tab2.col
from tab1
join tab2
on 2222000000 + tab1.col = tab2.col;
-- check execution plan
explain plan for
select tab1.col, tab2.col
from tab1
join tab2
on 2222000000 + tab1.col = tab2.col;
select * from table(dbms_xplan.display);
Using this approach Oracle will be able to use indexes for joining !
I am saving table ids as foreign key into another table using Oracle Apex Shuttle field like(3:4:5). Now I want to use these IDS in sql query using IN Clause. I have replaced : with , using replace function but it shows
no data found
message.
The following query works fine when I use static values.
select * from table where day_id IN(3,4,5)
But when I try to use
select * from table where id IN(Select id from table2)
it shows no data found.
From what i understand you have a list like 1:2:3:4 that you want to use in a IN clause; you can transform the list into separated values like this:
select regexp_substr('1:2:3:4','[^:]+', 1, level) as list from dual
connect by regexp_substr('1:2:3:4', '[^:]+', 1, level) is not null;
This will return:
List
1
2
3
4
Then you can simply add it to your query like this:
SELECT *
FROM TABLE
WHERE day_id IN
(SELECT regexp_substr('1:2:3:4','[^:]+', 1, level) AS list
FROM dual
CONNECT BY regexp_substr('1:2:3:4', '[^:]+', 1, level) IS NOT NULL
);
Can you try below statement. It has working as you expected.
create table table1 (id number, name varchar2(20));
alter table table1 add constraints pri_cons primary key(id);
create table table2 (id number, name varchar2(20));
alter table table2 add constraints ref_cons FOREIGN KEY(id) REFERENCES table1 (id);
begin
insert into table1 values (1,'Bala');
insert into table1 values (2,'Sathish');
insert into table1 values (3,'Subbu');
insert into table2 values (1,'Nalini');
insert into table2 values (2,'Sangeetha');
insert into table2 values (3,'Rubini');
end;
/
select * from table1 where id IN (Select id from table2);
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)