模拟组，按顺序，从mysql限制到ms sql 2000

Question

I have a query in MySQL:

select slscod,slsname,brc
from td_casa
group by slscod
order by slsname
limit 0,100

This query retrieves the top 100 unique sales codes with slsname and brc , ordered by slsname ascending.

How to change this query in MSSQL 2000?

Answer 1

The basic syntax is:

select top 100 slscod,slsname,brc 
from td_casa 
group by slscod 
order by slsname

Answer 2

SELECT TOP 100 slscod, slsname, brc
FROM td_casa
GROUP BY slscod, slsname, brc
ORDER BY slsname

Note: regarding your comment about Column 'xyz' is invalid in the select ... error I noticed that you were selecting 3 columns but specified 1 column in the GROUP BY clause. This is a MySQL specific behavior as described here :

MySQL extends the use of GROUP BY to permit selecting fields that are not mentioned in the GROUP BY clause. If you are not getting the results that you expect from your query, please read the description of GROUP BY found in Section 11.15, "Functions and Modifiers for Use with GROUP BY Clauses".

Answer 3

because in MSSQL 2000 does not support the ROW_NUMBER() and LIMIT ... OFFSET .. finally, i found this query :

SELECT slscod, MIN(slsname) slsname, MIN(brc) brc FROM (
    SELECT top 30 slscod, MIN(slsname) slsname, MIN(brc) brc FROM
    (
        SELECT TOP (1*30) slscod, MIN(slsname) slsname, MIN(brc) brc
        FROM td_casa group by slscod
        ORDER BY slsname ASC
    ) AS t1 group by slscod
     ORDER BY slsname DESC ) AS t2 group by slscod ORDER BY MIN(slsname) ASC

This is the same if in mysql :

select slscod,slsname,brc from td_casa group by slscod order by slsname limit 0,30

if you change TOP (2*30) this is the same limit 30,30 . TOP (3*30) this is the same limit 60,30 and so on.

desperate need of effort. thanks all.let's cheers