Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers.
Questions asking for code must demonstrate a minimal understanding of the problem being solved. Include attempted solutions, why they didn't work, and the expected results. See also: Stack Overflow question checklist
Closed 9 years ago.
Improve this question
I have one parent table which consists of around 150 columns. I need to get the records from the parent table and insert them into 11 different child tables, which have the column names and data types.
Oracle has a very convenient INSERT ALL command that can help in this case.
The syntax of unconditional version is:
INSERT ALL
INTO child1( col1, col2, col3 ) VALUES( col1, col2, col3 )
INTO child2 VALUES( col1, col2, col3 )
INTO child3 ( col1, col2, col3 )
INTO child4
SELECT col1, col2, col3
FROM parent
-- WHERE some conditions;
A link to a demo: --> http://sqlfiddle.com/#!4/3eb62/1
The above command retrieves all rows from the parent table using SELECT ... FROM ... (at the bottom), then, for each retrieved record, it executes all INSERT ... statements.
If the SELECT clause has also a WHERE conditions clause, then only rows that meet these conditions will be inserted.
The INSERT part of the query in the example could have various forms:
A full form with explicitely definied columns of source and destination tables:
INTO dest_table( destcol1, ... destcolN ) VALUES (sourcecol1, ..., sourcecolN)
A shortened form where only columns from source table are given
INTO dest_table VALUES (sourcecol1, ..., sourcecolN)
Another shortened form where only columns from destination table are given
INTO dest_table( destcol1, ... destcolN )
or the simplest:
INTO dest_table
INSERT ALL has also a conditional version:
INSERT ALL
WHEN 1=1 THEN INTO child1( col1, col2, col3 ) VALUES( col1, col2, col3 )
WHEN col1 <> 2 THEN INTO child2 VALUES( col1, col2, col3 )
WHEN col3 < 3 THEN INTO child3 ( col1, col2, col3 )
WHEN col2 = 'rec 3' THEN INTO child4
SELECT col1, col2, col3
FROM parent;
A link to a demo: ---> http://sqlfiddle.com/#!4/e7da3/1
This version inserts rows only when a condition specified after WHEN clause is meet.For each selected rows always all conditions are evaluated.
There is also another conditional form: INSERT FIRST
INSERT FIRST
WHEN col1 >= 4 THEN INTO child1( col1, col2, col3 ) VALUES( col1, col2, col3 )
WHEN col1 >= 3 THEN INTO child2 VALUES( col1, col2, col3 )
WHEN col1 >= 2 THEN INTO child3 ( col1, col2, col3 )
WHEN col1 >= 1 THEN INTO child4
SELECT col1, col2, col3
FROM parent;
A link to a demo: http://sqlfiddle.com/#!4/a421e/1
Here, for each source row, Oracle evaluates conditions from top to bottom, and when some condition is true, then executes only this one INSERT statement, and skips remaining inserts.
------- EDIT -------
An example how to do it in a procedural way:
CREATE OR REPLACE PROCEDURE name
AS
BEGIN
INSERT ALL
INTO child1( col1, col2, col3 ) VALUES( col1, col2, col3 )
INTO child2 VALUES( col1, col2, col3 )
INTO child3 ( col1, col2, col3 )
INTO child4
SELECT col1, col2, col3
FROM parent ;
-- if commit is required, place it here
-- COMMIT;
END;
/
Related
I have a package in oracle. In the package i have a procedure which performs an (insert into ..select.. ) statement
which is like this:
insert into some_table(col1 , col2 , col3, col4)
select col1 , col2, my_func(col3) as new_col3 , col4
from some_other_table
my_func(col3) does some logic to return a value.
now i need to to return two values instead of one, using the same logic.
i can simply write another function to do the same logic and return the second value, but that would be expensive because the function selects from a large history table.
i can't do a join with the history table because the function doesn't perform a simple select.
is there a way to get two columns by calling this function only once?
Create an OBJECT type with two attributes and return that from your function. Something like:
SQL Fiddle
Oracle 11g R2 Schema Setup:
CREATE TYPE my_func_type IS OBJECT(
value1 NUMBER,
value2 VARCHAR2(4000)
);
/
CREATE FUNCTION my_func
RETURN my_func_type
IS
value my_func_type;
BEGIN
value := my_func_type( 42, 'The Meaning of Life, The Universe and Everything' );
RETURN value;
END;
/
CREATE TABLE table1 (col1, col2, col5 ) AS
SELECT 1, 2, 5 FROM DUAL
/
Query 1:
SELECT col1,
col2,
t.my_func_value.value1 AS col3,
t.my_func_value.value2 AS col4,
col5
FROM (
SELECT col1,
col2,
my_func() AS my_func_value,
col5
FROM table1
) t
Results:
| COL1 | COL2 | COL3 | COL4 | COL5 |
|------|------|------|--------------------------------------------------|------|
| 1 | 2 | 42 | The Meaning of Life, The Universe and Everything | 5 |
I have a complex query that creates a master CTE_Table form other CTE_Tables. I want to insert the results of the master CTE_Table into a physical table. I'm using Teradata version 15.10.04.03
SELECT Failed. [3707] Syntax error, expected something like a 'SELECT' keyword or '(' or a 'TRANSACTIONTIME' keyword or a 'VALIDTIME' keyword between ')' and the 'INSERT' keyword.
DROP TABLE dbname.physicalTablename ;
CREATE MULTISET TABLE dbname.physicalTablename ,
NO FALLBACK ,
NO BEFORE JOURNAL,
NO AFTER JOURNAL,
CHECKSUM = DEFAULT,
DEFAULT MERGEBLOCKRATIO
(
col1 INTEGER,
col2 INTEGER,
col3 INTEGER
)
NO PRIMARY INDEX ;
WITH
cteTable3 AS
( SELECT A.colA, A.colB, A.colC, B.col1, B.col2, B.col3
FROM cteTable1 A INNER JOIN cteTable2 ON (blah blah blah) ),
cteTable2 AS
( SELECT col1, col2, col3 FROM SourceTableB ),
cteTable1 AS
( SELECT colA, colB, colC FROM SourceTableA )
INSERT INTO dbname.physicalTablename
( col1, col2, col3, col4, col5, col6 )
SELECT
(C3.colA, C3.colB, C3.colC, C3.col1, C3.col2, C3.col3)
FROM cteTable3 C3 ;
While you are missing the INSERT portion of the question, I think the following might clear things up. The correct format for using a CTE in an INSERT is:
INSERT INTO <tablename>
WITH <cte> AS (SELECT...)
SELECT <fields> FROM <cte>
Consider the following:
CREATE MULTISET VOLATILE TABLE tmp AS (SELECT 'bobby' as firstname) WITH DATA ON COMMIT PRESERVE ROWS;
INSERT INTO tmp
WITH cte AS (select 'carol' as firstname)
SELECT * FROM cte;
SELECT * FROM tmp;
DROP TABLE tmp;
I have 2 different tables and I want to delete records from table1 which does not exist in Tables2
Table1:
select col1 from Table1
Table2:
select
concat('A_',col1)
from
Table2
where
Col2 = '748'
and Col3 = 'D'
and Col4 = 'Account'
now I want to delete the difference from Table1...
This can be done using the minus operation, and an insert into statement.
insert into table3(col) (
select col1 from Table1
minus
select
concat('A_',col1)
from
Table2
where
Col2 = '748'
and Col3 = 'D'
and Col4 = 'Account'
)
Records can then be deleted from table1 using a delete statement like
delete from table1
where col1 in (
select col1 from Table1
minus
select
concat('A_',col1)
from
Table2
where
Col2 = '748'
and Col3 = 'D'
and Col4 = 'Account'
)
delete from table1 t1
where not exists ( select * from table2 where col2 || col3 || col4 = t1.col1 );
This will work EXCEPT for the following situation; you need to explain what you want in that case. The DELETE statement can be modified to accommodate.
If t1.col1 is NULL, it will be deleted even if there are rows in table2 where col2, col3 and col4 are all NULL. Is that situation possible (where t1.col1 and col2, col3, col4 in table2 are all NULL? In that case, should the row in t1 be kept rather than deleted?
problem in avoiding duplicates using XMLAGG function
A table which is having multiple records. where each record has one column contains repetitive date.
Using XMLAGG function in the following sql
select col1, col2, XMLAGG(XMLELEMENT(E, colname || ',')).EXTRACT('//text()')
from table
group by col1, col2
i get the following output
col1 col2 col3
hareesh apartment residential, commercial, residential, residential
But i need the following output as
col3 : residential, commercial.
Anyone help me
Try using a subquery to remove duplicates:
SELECT col1, col2, XMLAGG(XMLELEMENT(E, colname || ',')).EXTRACT('//text()')
FROM (SELECT DISTINCT col1, col2, colname FROM table)
GROUP BY col1, col2
Have 2 tables with same columns and want to generate the difference between the tables and want to show the difference listing all columns from both tables
example:
select a.*,b.* from (
(
select a.col1,a.col2 from
(select col1, col2 from table1 minus select col1, col2 from table2) as a
)
union
(
select b.col1, b.col2 from
(select col1, col2 from table2 minus select col1, col2 from table2) as b
)
)
The result should be
a.col1 a.col2 b.col1 b.col2
a.FName a.ZipCode b.FName b.ZipCode
John <same value> Jane <same value as A>
Alpha 1234 Beta 2345
My query returns exception that it is missing R parenthesis after the 1st minus keyword
I think you are trying to find rows from table a which are missing in table b and rows in table b which are missing from table a. However, there is no point in joining these two sets. Try the following query and see if it works for you.
SELECT col1, col2, 'Missing from table 2' title
FROM
(
SELECT col1,
col2
FROM table1
MINUS
SELECT col1,
col2
FROM table2
)
UNION ALL
SELECT col1, col2, 'Missing from table 1' title
FROM
(
SELECT col1,
col2
FROM table2
MINUS
SELECT col1,
col2
FROM table1
)