Select all columns except one in MySQL?

Question

I\'m trying to use a select statement to get all of the columns from a certain MySQL table except one. Is there a simple way to do this?

EDIT: There are 53 columns i

Answer 1

I liked the answer from @Mahomedalid besides this fact informed in comment from @Bill Karwin. The possible problem raised by @Jan Koritak is true I faced that but I have found a trick for that and just want to share it here for anyone facing the issue.

we can replace the REPLACE function with where clause in the sub-query of Prepared statement like this:

Using my table and column name

SET @SQL = CONCAT('SELECT ', (SELECT GROUP_CONCAT(COLUMN_NAME) FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME = 'users' AND COLUMN_NAME NOT IN ('id')), ' FROM users');
PREPARE stmt1 FROM @SQL;
EXECUTE stmt1;

So, this is going to exclude only the field id but not company_id

Answer 2

My main problem is the many columns I get when joining tables. While this is not the answer to your question (how to select all but certain columns from one table), I think it is worth mentioning that you can specify table. to get all columns from a particular table, instead of just specifying .

Here is an example of how this could be very useful:

select users.*, phone.meta_value as phone, zipcode.meta_value as zipcode

from users

left join user_meta as phone
on ( (users.user_id = phone.user_id) AND (phone.meta_key = 'phone') )

left join user_meta as zipcode
on ( (users.user_id = zipcode.user_id) AND (zipcode.meta_key = 'zipcode') )

The result is all the columns from the users table, and two additional columns which were joined from the meta table.

Answer 3

It is good practice to specify the columns that you are querying even if you query all the columns.

So I would suggest you write the name of each column in the statement (excluding the one you don't want).

SELECT
    col1
    , col2
    , col3
    , col..
    , col53

FROM table

Answer 4

Yes, though it can be high I/O depending on the table here is a workaround I found for it.

SELECT *
INTO #temp
FROM table

ALTER TABLE #temp DROP COlUMN column_name

SELECT *
FROM #temp

Answer 5

To the best of my knowledge, there isn't. You can do something like:

SELECT col1, col2, col3, col4 FROM tbl

and manually choose the columns you want. However, if you want a lot of columns, then you might just want to do a:

SELECT * FROM tbl 

and just ignore what you don't want.

In your particular case, I would suggest:

SELECT * FROM tbl

unless you only want a few columns. If you only want four columns, then:

SELECT col3, col6, col45, col 52 FROM tbl

would be fine, but if you want 50 columns, then any code that makes the query would become (too?) difficult to read.

Answer 6

If you are looking to exclude the value of a field, e.g. for security concerns / sensitive info, you can retrieve that column as null.

e.g.

SELECT *, NULL AS salary FROM users