sql server - Random Variable Selection in SQL -


i have seen few questions this, nothing has answered i'm looking for.

i have 5,000 rows of data on 3 years. every line has memberid, memberids repeat , unique individual (but repeat in column if individual in system multiple times on 3 years).

how can pull 100 random memberids on course of 3 years? (so theoretically there more 100 lines because memberids can repeat)

edit: should clarify, member id character, not numeric. ex: w4564

note: not looking n rows, rather 100 different ids on course of 3 years, id might associated 3 rows in result. result have differing number of rows each time sql run.

depending on how data indexed, grab rows memberid subquery. example:

select * <yourtable> memberid in (select distinct top 100 memberid <yourtable>)

that should return random memberids, depending on index. if need force it, can in linked question in comments, , sort randomly:

select * <yourtable> memberid in (select distinct top 100 memberid <yourtable> order newid())

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