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POsubstring_index function does not exist error
 

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  1. POsubstring_index function does not exist error
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    <p>I have a table named 'data' which stores the email addresses and city of users and I want to find the most popular email domain. I use the following query to to find the rows which have maximum value. exapmple for my table:</p> <pre><code>Email Name City dsmks@gmail.com John California sak@gmail.com Leo sydney dsnk@gmail.com Ross NY askd@yahoo.com Ronny Canberra ajs@yahoo.com Monty London kasl@yahoo.com Jim washington uy@hotmail.com Finn Las vegas </code></pre> <p>I have computed the answer using this query</p> <pre><code> select x.city, x.No_of_People from (select e.city, count(e.city) as No_of_People from data e group by e.city) x where x.No_of_People = (select max(x2.No_of_People) from (select e2.city, count(e2.city) as No_of_People from data e2 group by e2.city) x2) </code></pre> <p>But i don't wan't to use limits as it does not return multiple rows. So I have used the following query using this <a href="https://stackoverflow.com/questions/12543723/selecting-multiple-maximum-rows">answer</a></p> <pre><code> select x.substring_index (email,'@',-1), x.No_of_Users from (select e.substring_index (email,'@',-1), count(e.substring_index (email,'@',-1)) as No_of_Users from data e group by e.substring_index (email,'@',-1)) x where x.No_of_Users = (select max(x2.No_of_Users) from (select e2.substring_index (email,'@',-1), count(e2.substring_index (email,'@',-1)) as No_of_Users from data e2 group by e2.substring_index (email,'@',-1)) x2) </code></pre> <p>The query that i'm using is giving this error "FUNCTION e2.substring_index does not exist". help me.</p>
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    1. PO
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    1. This table or related slice is empty.
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    1. This table or related slice is empty.
    1. This table or related slice is empty.
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    1. This table or related slice is empty.
    1. This table or related slice is empty.
 

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