I'm looking for a way I can duplicate all the rows in my database, I tried exporting it and then importing but I get the duplicate key error.
The reason is purely for testing purposes, I just want a load of dummy data in there to test the system I have out.
Is there a direct statement for this? Or is there a way to export all data except ID (or change ID to MAX(ID) + 1 or AUTO INCREMENT)?
You can try this:
INSERT INTO your_table_name(parent_id,priority,text,shortname,weighting,g_or_a,
dept,ksf,day_start,day_end,date_start,date_end,depends_on,is_question,budget,
ccode,responsible,accountable,consulted,informed)
(SELECT parent_id,priority,text,shortname,weighting,g_or_a,dept,ksf,
day_start,day_end,date_start,date_end,depends_on,is_question,budget,ccode,
responsible,accountable,consulted,informed FROM your_table_name);
Firstly, insert one row in the table 'your_table_name'. Replace your_table_name with the actual table name in above code & execute the code repeatedly until it satisfies the required row numbers. I think it should work.
Put 1 record and then run:
insert into mytable select * from mytable
10 times. This will give you 1024 records. Continue until satisfied.
You could use an INSERT and the values would be a SELECT, just don't select the primary key and don't define it in the insert fields.
Imagine a table with 3 fields, the_pk, field_1, field_2
Something like
INSERT INTO the_table(field_1, field_2) (SELECT field_1, field_2 FROM the_table)
Related
I looked into MySQL duplicate key but cant figure it out.
I have a table like below:
id series chapter path(can be unique)
I want only insert data and not update. Lets say I have data like below:
seri:Naruto, klasor:567 ==> If both of these exist in table then do not insert.
seri:Naruto, klasor:568 ==> If Naruto exist but 568 does not exist then do insert.
How can I achieve this?
Easiest way would be to define unique index with two columns on that table:
ALTER TABLE yourtable ADD UNIQUE INDEX (seri,klasor);
You may also define two column primary key, which would work just as well.
Then use INSERT IGNORE to only add rows when they will not be duplicates:
INSERT IGNORE INTO yourtable (seri, klasor) VALUES ('Naruto',567);
INSERT IGNORE INTO yourtable (seri, klasor) VALUES ('Naruto',568);
Edit: As per comments, you can't use UNIQUE INDEX which complicates things.
SET #seri='Naruto';
SET #klasor=567;
INSERT INTO yourtable
SELECT seri,klasor FROM (SELECT #seri AS seri, #klasor AS klasor)
WHERE NOT EXISTS (SELECT seri, klasor FROM yourtable WHERE seri=#seri AND klasor=#klasor);
You may use the above query with two local variables or convert it to single statement by replacing the local variables with actual values.
Better way would be to use stored procedure:
CREATE PROCEDURE yourinsert (vseri VARCHAR(8), vklasor INT)
BEGIN
DECLARE i INT;
SELECT COUNT(*) INTO i FROM yourtable WHERE seri=vseri AND klasor=vklasor;
IF i=0 THEN
INSERT INTO yourtable (seri,klasor) VALUES (vseri, vklasor);
END IF;
END;
This would allow you to perform the INSERT using:
CALL yourinsert('Naruto',567);
INSERT INTO table_name (seri, klasor) VALUES ('Naruto',567)
WHERE NOT EXISTS( SELECT seri,klasor FROM table_name WEHERE seri='Naruto' AND klasor=567
)
Hope this helps..
I am trying to insert my values into table if Admin_User_Role_Id value against Admin_Id is not present in the table. Is it possible to insert!
My Table Structure:
Admin_User_Id (FK)
Admin_User_Role_Id (FK)
Is_Enabled (boolean flag)
Query which I tried, but not success
INSERT INTO role_association
SET Admin_User_Id=61, Admin_User_Role_Id=2, Is_Enabled=0
WHERE Admin_User_Role_Id
NOT IN
(SELECT Admin_User_Id, Admin_User_Role_Id FROM role_association)
I think it is possible but my logic is wrong. How should I manage this query to work successfully!
INSERT syntax cannot have WHERE clause. The only time you will find INSERT has WHERE clause is when you are using INSERT INTO...SELECT statement.
Probably you take care about where condition in your programming logic and write a simple insert statement and the depending on your logic use this statement to insert the records. Hope you got my point.
You want to insert your values in your table using this query for your reference
INSERT INTO Yourtablename(column1,column2,column3,...)
VALUES ('value1','value2','value3',.....);
You want to ADD one new column in your table means using this query
** ALTER TABLE table_name ADD column_name datatype**
Is there a way to use a MySQL INSERT similar to the following:
INSERT INTO doc_details SELECT * FROM doc_details WHERE dd_id = 1
This doesn't work because the primary key is being repeated and it can get very long-winded expanding the columns out.
The purpose of this is to duplicate rows in the same table which will get modified later, retrieving the last_insert_id for the new record. So ideas for other ways to do this would be appreciated too.
Thanks.
Simply name the columns you want to duplicate and omit the primary key:
INSERT INTO doc_details (col1, col2, col3)
SELECT col1, col2, col3
FROM doc_details
WHERE dd_id = 1
I'd suggest you to make ID field with AUTO_INCREMENT option, then use NULL values when inserting -
INSERT INTO doc_details(id, column1, column2)
SELECT NULL, column1, column2 FROM doc_details WHERE dd_id = 1;
In this case old ID will be changed with new ones.
You can depend on temporary table to copy from old record and omitting the key field value.
You have to use at least one named column, i.e. the key field name, to omit its repeating values.
See the following example:
CREATE TEMPORARY TABLE tmp SELECT * from doc_details WHERE dd_id = ?;
ALTER TABLE tmp drop pk_field_name_here; -- drop the key field for not repeating
INSERT INTO doc_details SELECT 0, tmp.* FROM tmp;
DROP TABLE tmp;
You can observe that no other filed names are used but the key field name to omit it's value.
You can also refer to my answer to a similar posting at: Mysql: Copy row but with new id.
Thanks for the answers. Really appreciated. Because most answers specify the column, this led to some extra research that said 'wildcards cannot be used in INSERT statements. Select, Modify and insert into the same table
I managed to solve this in my application with a separate SELECT then the INSERT with the columns expanded with a Perl map function:
SELECT * FROM doc_details WHERE dd_id = 1
Then in Perl, with the row as a hash reference in $data:
$data->{'dd_id'} = 0;$columns = join(',', map {$_ .'='. $dbh->quote( $data->{$_} ) } keys %{$cdh} );
Does the trick nicely - it copies the row regardless of changes to the column structure/order as long as the auto_increment column is maintained.
I know it's not a pure SQL solution - although Ravinder provided one that was.
Thanks to all!
Is there a way to do an insert under a count condition, something like:
INSERT INTO my_table (colname) VALUES('foo') IF COUNT(my_table) < 1
Basically I want to insert a single default record if the table is currently empty. I'm using mysql.
Use SELECT instead of VALUES to be able to expand the query with a WHERE clause.
EXISTS is a better & faster test than COUNT
INSERT INTO my_table (colname)
SELECT 'foo'
WHERE NOT EXISTS (SELECT * FROM my_table)
One way would be to place a unique key on a column. Then execute a REPLACE:
REPLACE [LOW_PRIORITY | DELAYED]
[INTO] tbl_name [(col_name,...)]
{VALUES | VALUE} ({expr | DEFAULT},...),(...),...
REPLACE works exactly like INSERT,
except that if an old row in the table
has the same value as a new row for a
PRIMARY KEY or a UNIQUE index, the old
row is deleted before the new row is
inserted
This is easier to read:
INSERT INTO my_table (colname)
SELECT 'foo' FROM DUAL
WHERE NOT EXISTS (SELECT * FROM my_table);
The lack of a VALUES is mitigated by the SELECT FROM DUAL which will provide the values. the FROM DUAL is not always required, but it doesn't hurt to include it for that weird configurations where it is required (like the installation of Percona I am using).
The NOT EXISTS is faster than doing a count which can be slow on a table with a large number of rows.
Sometimes if I want to quickly copy records from one table to another (that has the same structure) I use a query like this:
INSERT INTO table2 SELECT * FROM
table1 WHERE id = SOME_VALUE
How can I add a ON DUPLICATE KEY UPDATE to this statement? I tried this:
INSERT INTO SELECT * FROM table1 WHERE
id = 1 ON DUPLICATE KEY UPDATE SELECT
* FROM table1 WHERE id = 1
But I get an error. Is there away to accomplish the query above with out individually listing each column in the query?
P.S. Yes, I realize that it is not good practice to have multiple tables with identical structures, but sometimes you just don't get control over everything in the workplace!
The below UPDATES if there is no PK duplication and INSERTs is there is:
REPLACE INTO table2(field1, field2, field3)
SELECT field1, field2,field3 FROM table1
WHERE id=1;
http://dev.mysql.com/doc/refman/5.0/en/insert-on-duplicate.html Just use the SELECT field_name from the other table like in dnagirls example