Geek asks and answers

How can I select all rows where each column does not match a value?

I need to choose the value itself, which is not equal to some statement.

Sort of

SELECT * FROM table WHERE * != "qwerty"

But don't like it

SELECT * FROM table WHERE column_name != "qwerty"

How can i do this?

I have a table like

       1   2   3   4   5   6   7   8   9   10   11   ...   ...
    1  a   b   c   d   t   h   v   h   d   t    y    ...   ...
    2  g   t   5   s   h   r   q   q   q   q    q    ...   ...
   ... ...
   ... ...

I need to select every value that is not equal to "q"

I could do something like

SELECT * WHERE 1 != q AND 2 != q AND 3 != q ...

but i have toomany columns

+3
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3 answers

Try the following:

SELECT * FROM table WHERE "qwerty" NOT IN (column1,column2,column3,column4,etc)

Another example:

-- this...
SELECT 'HELLO!' FROM tblx 
WHERE 'JOHN' NOT IN (col1,col2,col3);

-- ...is semantically equivalent to:
SELECT 'HELLO!' FROM tblx 
WHERE 'JOHN' <> col1
  AND 'JOHN' <> col2
  AND 'JOHN' <> col3;

Data source:

create table tblx(col1 text,col2 text,col3 text);
 insert into tblx values
('GEORGE','PAUL','RINGO'), 
('GEORGE','JOHN','RINGO');

If you use Postgresql, you can create a shortcut for the columns:

select * 
from
(
select 

   row(tblx.*)::text AS colsAsText,

   translate(row(tblx.*)::text,'()','{}')::text[]
      as colsAsArray

from tblx
) x
where 'JOHN' <> ALL(colsAsArray)

Live test: http://www.sqlfiddle.com/#!1/8de35/2

Postgres can create strings from arrays, 'JOHN' <> ALLequivalent to ::

where 'JOHN' NOT IN (SELECT unnest(colsAsArray))

Live test: http://www.sqlfiddle.com/#!1/8de35/6

, ,

MySQL:

select 
  @columns := group_concat(column_name)
from information_schema.columns
where table_name = 'tblx'
group by table_name;




set @dynStmt := 
   concat('select * from tblx where ? NOT IN (',  @columns ,')');



select @dynStmt;

prepare stmt from @dynStmt;

set @filter := 'JOHN';

execute stmt using @filter;

deallocate prepare stmt;

Live test: http://www.sqlfiddle.com/#!2/8de35/49

+7

.

select GROUP_CONCAT(COLUMN_NAME SEPARATOR ' != ''q'' AND ') as Exp
from INFORMATION_SCHEMA.COLUMNS
where TABLE_NAME = 'YourTable'

, SQL , - .

+3

, SHOW COLUMNS:

SHOW COLUMNS FROM SomeTable

.

:

    [Field] => id
    [Type] => int(7)
    [Null] =>  
    [Key] => PRI
    [Default] =>
    [Extra] => auto_increment

, :

SELECT * FROM table WHERE "qwerty" NOT IN (columnName1,columnName2,columnName3,columnName4,etc)
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