Condition as a column named using AS "name" in mysql

I am trying to count line that has columns which been repeated (their value) more than x times in mysql, every time I 开发者_如何学运维try to execute this query I get an error :

SELECT DISTINCT
    idLogin, count(idLogin ) AS "cou" 
FROM 
   `products` AS t
GROUP BY 
    idLogin
HAVING 
    t.cou > 2

why this error is happening

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Use this one

SELECT DISTINCT   idLogin, count(idLogin ) AS cou  FROM   `products` 
GROUP BY idLogin HAVING cou > 2

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you can put that expression count(idLogin ) directly in having clouse....

it will not give any error.. and will be more understable as well....

or else you can do one thing -

select idLogin,cou from (
SELECT DISTINCT   idLogin, count(idLogin ) AS cou  
FROM   products 
GROUP BY idLogin ) t
where t.cou >2 

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Remove the double quotes from the aliased column name.

MySQL uses single back-quotes for escaping table and column names, not double quotes.

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The correlation name t does not have a column cou. Just use this:

HAVING cou > 2

PS: DISTINCT is redundant in your query. The GROUP BY ensures there will only be one row per distinct value of idLogin.