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 want to write a query which finds the difference between two tables and writes updates or new data into third table. My two tables have identical column names. Third table which captures changes have extra column called comment. I would like to insert the comment whether it is a new row or updated row based on the row modification.
**TABLE1 (BACKUP)**
KEY,FIRST_NAME,LAST_NAME,CITY
1,RAM,KUMAR,INDIA
2,TOM,MOODY,ENGLAND
3,MOHAMMAD,HAFEEZ,PAKISTAN
4,MONIKA,SAM,USA
5,MIKE,PALEDINO,USA
**TABLE2 (CURRENT)**
KEY,FIRST_NAME,LAST_NAME,CITY
1,RAM,KUMAR,USA
2,TOM,MOODY,ENGLAND
3,MOHAMMAD,HAFEEZ,PAKISTAN
4,MONIKA,SAM,INDIA
5,MIKE,PALEDINO,USA
6,MAHELA,JAYA,SL
**TABLE3 (DIFFERENCE FROM TABLE2 TO TABLE1)**
KEY,FIRST_NAME,LAST_NAME,CITY,COMMENT
1,RAM,KUMAR,USA,UPDATE
4,MONIKA,SAM,INDIA,UPDATE
6,MAHELA,JAYA,SL,INSERT
table scripts
DROP TABLE TABLE1;
DROP TABLE TABLE2;
DROP TABLE TABLE3;
CREATE TABLE TABLE1
(
KEY NUMBER,
FIRST_NAME VARCHAR2(100),
LAST_NAME VARCHAR2(100),
CITY VARCHAR2(50)
);
/
CREATE TABLE TABLE2
(
KEY NUMBER,
FIRST_NAME VARCHAR2(100),
LAST_NAME VARCHAR2(100),
CITY VARCHAR2(50)
);
/
CREATE TABLE TABLE3
(
KEY NUMBER,
FIRST_NAME VARCHAR2(100),
LAST_NAME VARCHAR2(100),
CITY VARCHAR2(50),
COMMENTS VARCHAR2(200)
);
/
INSERT ALL
INTO TABLE1
VALUES(1,'RAM','KUMAR','INDIA')
INTO TABLE1 VALUES(2,'TOM','MOODY','ENGLAND')
INTO TABLE1 VALUES(3,'MOHAMMAD','HAFEEZ','PAKISTAN')
INTO TABLE1 VALUES(4,'MONIKA','SAM','USA')
INTO TABLE1 VALUES(5,'MIKE','PALEDINO','USA')
SELECT 1 FROM DUAL;
/
INSERT ALL
INTO TABLE2
VALUES(1,'RAM','KUMAR','USA')
INTO TABLE2 VALUES(2,'TOM','MOODY','ENGLAND')
INTO TABLE2 VALUES(3,'MOHAMMAD','HAFEEZ','PAKISTAN')
INTO TABLE2 VALUES(4,'MONIKA','SAM','INDIA')
INTO TABLE2 VALUES(5,'MIKE','PALEDINO','USA')
INTO TABLE2 VALUES(6,'MAHELA','JAYA','SL')
SELECT 1 FROM DUAL;
I was using the merge statement to accomplish the same. but i have hit a roadblock in merge statement , it's rhrowing an error "SQL Error: ORA-00905: missing keyword
00905. 00000 - "missing keyword"" I dont understand where is the error. please help
INSERT INTO TABLE3
SELECT KEY,FIRST_NAME,LAST_NAME,CITY,NULL AS COMMENTS FROM TABLE2
MINUS
SELECT KEY,FIRST_NAME,LAST_NAME,CITY,NULL AS COMMENTS FROM TABLE1
;
MERGE INTO TABLE3 A
USING TABLE1 B
ON (A.KEY=B.KEY)
WHEN MATCHED THEN
UPDATE SET A.COMMENTS='UPDATED'
WHEN NOT MATCHED THEN
UPDATE SET A.COMMENTS='INSERTED';
There is no such WHEN NOT MATCHED THEN UPDATE clause, you should use WHEN NOT MATCHED THEN INSERT. Refer to MERGE for details.
A few assumptions made about the data:
An INSERT event will be a record identified by its key in table2 (current data) that does not have a matching key in the original back-up table: table1.
An UPDATE event is a field that exists in both table1 and table2 for the same KEY but is not the same.
Records which did not change between tables are not to be recorded in table3.
Example Query: Check for Updates
SELECT UPD_QUERY.NEW_CITY, 'UPDATED' as COMMENTS
FROM (SELECT CASE WHEN REPLACE(CURR.CITY, BKUP.CITY,'') IS NOT NULL THEN CURR.CITY
ELSE NULL END as NEW_CITY
FROM table1 BKUP, table2 CURR
WHERE BKUP.KEY = CURR.KEY) UPD_QUERY
WHERE UPD_QUERY.NEW_CITY is NOT NULL;
You can repeat this comparison method for the other fields:
SELECT UPD_QUERY.*
FROM (SELECT CURR.KEY,
CASE WHEN REPLACE(CURR.FIRST_NAME, BKUP.FIRST_NAME,'') IS NOT NULL
THEN CURR.FIRST_NAME
ELSE NULL END as FIRST_NAME,
CASE WHEN REPLACE(CURR.LAST_NAME, BKUP.LAST_NAME,'') IS NOT NULL
THEN CURR.LAST_NAME
ELSE NULL END as LAST_NAME,
CASE WHEN REPLACE(CURR.CITY, BKUP.CITY,'') IS NOT NULL
THEN CURR.CITY
ELSE NULL END as CITY
FROM table1 BKUP, table2 CURR
WHERE BKUP.KEY = CURR.KEY) UPD_QUERY
WHERE COALESCE(UPD_QUERY.FIRST_NAME, UPD_QUERY.LAST_NAME, UPD_QUERY.CITY)
is NOT NULL;
NOTE: This could get unwieldy very quickly if the number of columns compared are many. Since the target table design (table3) requires not only identification of a change, but the field and its new value are also recorded.
Example Query: Look for Newly Added Records
SELECT CURR.*, 'INSERTED' as COMMENTS
FROM table2 CURR, table1 BKUP
WHERE CURR.KEY = BKUP.KEY(+)
AND BKUP.KEY is NULL;
Basically MERGE forces the operation: MATCHED=UPDATE (or DELETE), NOT MATCHED = INSERT. It's in the docs.
You can do what you want but you need two insert statements with different set operators,
For UPDATED:
Insert into table3
table1 INTERSECT table2
For INSERTED:
Insert into table3
table2 MINUS table1
I have two tables A and B .i want to copy or show the primary key column value from table A in the foreign key column in table B respectively .is there any method kindly help me.
Regards,
You can populate your primary key value while populating table B or by using a trigger when you are populating table A.
CREATE TABLE t1 (id1 NUMBER, dt DATE);
ALTER TABLE t1 ADD (
CONSTRAINT t1_pk
PRIMARY KEY
(id1));
CREATE TABLE t2 (id2 NUMBER, id1 NUMBER, dt2 DATE);
ALTER TABLE t2 ADD (
CONSTRAINT t2_pk
PRIMARY KEY
(id2));
ALTER TABLE t2
ADD CONSTRAINT t2_r01
FOREIGN KEY (id2)
REFERENCES t1 (id1);
First Approach, by this way you could populate second table when you are inserting values.
INSERT INTO t1
VALUES (1, SYSDATE
);
INSERT INTO t2
VALUES (1, 1, SYSDATE
);
With trigger, so when values are inserted into first table second tables values are populated using a trigger. So primary key value of first table is being inserted into foreign key of table 2.
CREATE OR REPLACE TRIGGER my_trigger
AFTER INSERT
ON t1
FOR EACH ROW
BEGIN
INSERT INTO t2
VALUES (1, :new.id1, SYSDATE
);
EXCEPTION
WHEN NO_DATA_FOUND
THEN
DBMS_OUTPUT.put_line (TO_CHAR (SQLERRM (-20299)));
WHEN OTHERS
THEN
DBMS_OUTPUT.put_line (TO_CHAR (SQLERRM (-20298)));
END;
Need help in writing a stored procedure, for copying data from one table to multiple tables.
Here is the scenario example:
Table1 has 10 columns with 20 rows of data.
Table2 (primary key will be sequence generator),Table3
Insert 4 columns values from Table1 into Table2, and 4 columns into Table3 (Check condition below)
Condition when inserting data into table3:
-Whenever data is inserted into Table3 (from table1) there will be one field in table3 which has the primary key value of Table2 and some values from Table 1.
Please help....
try INSERT INTO dest_table (COL1,COL2,...,COLn) SELECT COLa,COLb,...,COLz FROM source_table