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POSQL : How to use count, sum and max function at the same sql command for MS ACCESS
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I'm so beginner at SQL. I'm only can do all this separately however i was confused when i have to do all these at the same SQL command. So could you please kindly help me on this.. I have 3 tables tbl_user, tbl_sActivity, tbl_client <pre><code>tbl_user user_id | first_name | last_name | 1 | name1 | last1 | 21 | name2 | last2 | 22 | name3 | last3 | tbl_sActivity user_id | client_id | act_status | act_date | 1 | 7 | cold | 19/7/12 | 1 | 7 | dealed | 30/7/12 | 22 | 5 | cold | 7/8/12 | 1 | 6 | cold | 16/7/12 | 1 | 6 | warm | 18/7/12 | 1 | 6 | hot | 25/7/12 | 1 | 6 | dealed | 7/8/12 | 1 | 8 | warm | 1/8/12 | 1 | 8 | dealed | 12/8/12 | 21 | 4 | warm | 8/8/12 | 21 | 4 | dealed | 10/8/12 | tbl_client client_id | client_price | 4 | 400 | 5 | 500 | 6 | 600 | 7 | 700 | 8 | 800 | </code></pre> I want the output looks like this <pre><code>user_id |Count_Client_id |Sum_client_price | Max_act_date| 1 | 3 | 2100 | 12/8/12 | 21 | 1 | 400 | 10/8/12 | 22 | 1 | 500 | 7/8/12 | </code></pre> thank you very much below is my attempt... <pre><code>SELECT tbl_user.user_id, Count(tbl_client.client_id) AS count_client, Sum(tbl_client.client_price) AS SumOfclient_price, tbl_user.first_name, tbl_user.last_name, Max(tbl_sActivity.act_date) AS MaxOfact_date FROM (tbl_client INNER JOIN tbl_sActivity ON (tbl_client.client_id=tbl_sActivity.client_id) AND (tbl_sActivity.client_id=tbl_client.client_id)) INNER JOIN tbl_user ON tbl_sActivity.user_id=tbl_user.user_id GROUP BY tbl_user.user_id, tbl_user.first_name, tbl_user.last_name; </code></pre> And this is the count(distinct client_id) that return the correct output <pre><code>SELECT tmp.user_id, Count(*) AS count_distinct_clients FROM (SELECT DISTINCT user_id, client_id FROM tbl_sActivity) AS tmp GROUP BY tmp.user_id; </code></pre>
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<sql><ms-access-2007>
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SQL : How to use count, sum and max function at the same sql command for MS ACCESS
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