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%%[
var @rows, @row, @rowCount, @numRowsToReturn, @lookupValue, @i

set @lookupValue = AttributeValue("lookupField") /* value from attribute or DE column in send context */
set @lookupValue = "whee" /* or a literal value */
set @numRowsToReturn = 0 /* 0 means all, max 2000 */
set @rows = LookupOrderedRows("DataExtensionName",@numRowsToReturn,"DEColumn1 desc, DEColumn2 asc","LookupColumn", @lookupValue)
set @rowCount = rowcount(@rows)

if @rowCount > 0 then

  for @i = 1 to @rowCount do

    var @DEColumn1, @DEColumn2
    set @row = row(@rows,@i) /* get row based on counter */
    set @DEColumn1 = field(@row,"DEColumn1")
    set @DEColumn2 = field(@row,"DEColumn2")

    ]%%

    Row %%=v(@i)=%%, DEColumn1 is %%=v(@DEColumn1)=%%, DEColumn2 is %%=v(@DEColumn2)=%%

    %%[ 
  next @i ]%%

%%[ else ]%%

No rows found

%%[ endif ]%%