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Output random rows from a data extension with AMPscript
%%[
var @debug
set @debug = 1
var @rn
var @rows
var @rowCount
var @arr
var @max
set @rows = LookupRows("DataExtensionTest", "lookupKey", 1)
set @rowCount = rowCount(@rows)
set @arr = ""
/* this increases the likeihood that all of the rows are represented */
set @max = multiply(@rowCount,10)
/* generate a delimited string of random numbers, at least one for each row in the DE */
for @i = 1 to @max Do
set @rn = concat('{', random(1,@rowCount),'}')
if indexof(@arr, @rn) < 1 then
set @arr = concat(@arr, @rn)
endif
next @i
if @debug == 1 then
output(concat("<br>arr(1): ", @arr))
endif
/* loop through and replace each random number with a value */
for @i = 1 to @rowCount do
set @row = row(@rows, @i)
set @subscriberKey = field(@row, "subscriberKey")
set @arr = replace(@arr, concat("{", @i ,"}"), concat("{", @subscriberKey ,"}"))
next @i
set @arr = replace(replace(replace(@arr,"}{","|"),"}",""),"{","")
if @debug == 1 then
output(concat("<br>arr(2): ", @arr))
endif
/* build a rowset from the delimited string */
set @outputRows = buildRowSetFromString(@arr, "|")
set @outputRowCount = rowCount(@outputrows)
/* iterate through the random rowset */
for @i = 1 to @outputRowCount do
set @outputRow = row(@outputRows, @i)
set @subscriberkey = field(@outputRow, 1)
output(concat("<br>subscriberkey",@i, ": ", @subscriberkey))
var @firstName
set @firstName = Lookup("DataExtensionTest","FirstName", "SubscriberKey", @subscriberkey)
output(concat(", firstName: ", @firstName))
next @i
]%%
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