>>>>>I don't know if this is doable.
>>>>>
>>>>>
>>>>>SELECT TOP 10 demo.idcard, hra.hraid, hraspec.hracomplet ;
>>>>> FROM demo d, hra h1, hraspec h2 ;
>>>>> WHERE d.ssnum = h1.ssnum ;
>>>>> AND h1.hraid = h2.hraid ORDER BY 1
>>>>>
>>>>>
>>>>>I want to extract first to 10 rolls from demo and their related records from hra and hraspec. I can't get it to work.
>>>>>
>>>>>What am I doing wrong.
>>>>>
>>>>>Thanks
>>>>
>>>>How about separating the commands? First, get the top 10 records, then join the result with other tables.
>>>
>>>
>>>Yes. I know.
>>>I thought there is a way to do it in one step.
>>>
>>>thank tho.
>>
>>Oh, one more thing. In times of old, I used to combine several tables into a single SELECT statement, until I found that separating it into several parts (join 2 table, join the result with a third table...) could DRASTICALLY speed up the queries.
>
>Thanks. I agree. But I'm stubborn. :)
Right. By the way, another stubborn habit which you are better off changing is the following: it is better to use JOIN syntax instead of WHERE, to specify how you join the table. Advantages are:
It is clearer how the tables are joint; which commands are for joining, as opposed to additional filters.
You can easily change an inner join to another join. This is much more complicated with the old syntax.
Difference in opinions hath cost many millions of lives: for instance, whether flesh be bread, or bread be flesh; whether whistling be a vice or a virtue; whether it be better to kiss a post, or throw it into the fire... (from Gulliver's Travels)
