CODEWITHSUNDEEP
mysqlsqlsql-delete
Kevin Parker
Kevin Parker

Reputation: 1420

Delete many rows from a table using id in Mysql

I am a Linux admin with only basic knowledge in Mysql Queries

I want to delete many table entries which are ip address from my table using id,

currently i am using 

DELETE from tablename where id=1;
DELETE from tablename where id=2;

but i have to delete 254 entries,so this method is going to take hours,how can i tell mysql to delete rows that i specify,coz i want to skip deleting some entries out of this 254.

Deleting whole table and importing needed entries is not an option.

Upvotes: 91

Views: 259907

Answers (11)

Daro from Poland
Daro from Poland

Reputation: 59

All responses are good but have one big wrong assumption that id is a number type. You must know column type in where deleting is performing. If this is a CHAR TYPE or similar string, You must ADD " like this:

DELETE from tablename WHERE id IN ("str1", "str2", "text",..., "string" );

In other case query will not perform and will return false.

Upvotes: 1

Phạm Thanh Tùng
Phạm Thanh Tùng

Reputation: 19

DELETE FROM tablename WHERE id > 0;
OR
DELETE FROM tablename WHERE id <255;

It deletes id from 1 to 254

Upvotes: 0

user6221709
user6221709

Reputation:

Hope it helps: 

DELETE FROM tablename 
WHERE tablename.id = ANY (SELECT id FROM tablename WHERE id = id);

Upvotes: 2

sameer kumar
sameer kumar

Reputation: 149

DELETE FROM table_name WHERE id BETWEEN 1 AND 256;

Try This.

Upvotes: 2

JoDev
JoDev

Reputation: 6873

The best way is to use IN statement :

DELETE from tablename WHERE id IN (1,2,3,...,254);

You can also use BETWEEN if you have consecutive IDs :

DELETE from tablename WHERE id BETWEEN 1 AND 254;

You can of course limit for some IDs using other WHERE clause :

DELETE from tablename WHERE id BETWEEN 1 AND 254 AND id<>10;

Upvotes: 228

Vivek Todi
Vivek Todi

Reputation: 381

If you have some 'condition' in your data to figure out the 254 ids, you could use:

delete from tablename
where id in 
(select id from tablename where <your-condition>)

or simply:

delete from tablename where <your-condition>

Simply hard coding the 254 values of id column would be very tough in any case.

Upvotes: 7

Boris the Spider
Boris the Spider

Reputation: 61198

Others have suggested IN, this is fine. You can also use a range:

DELETE from tablename where id<254 and id>3;

If the ids to delete are contiguous.

Upvotes: 4

Ghigo
Ghigo

Reputation: 2332

if you need to keep only a few rows, consider

DELETE FROM tablename WHERE id NOT IN (5,124,221);

This will keep only some records and discard others.

Upvotes: 7

Muhammad Hani
Muhammad Hani

Reputation: 8664

Use IN Clause 

   DELETE from tablename where id IN (1,2);

OR you can merge the use of BETWEEN and NOT IN to decrease the numbers you have to mention.

DELETE from tablename 
where (id BETWEEN 1 AND 255) 
AND (id NOT IN (254));

Upvotes: 3

cowls
cowls

Reputation: 24354

Something like this might make it a bit easier, you could obviously use a script to generate this, or even excel 

DELETE FROM tablename WHERE id IN (
1,
2,
3,
4,
5,
6
);

Upvotes: 5

John Woo
John Woo

Reputation: 263933

how about using IN

DELETE FROM tableName
WHERE ID IN (1,2) -- add as many ID as you want.

Upvotes: 10

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