finding count of duplicate values

hi gurus,

i have a situation where i need to find the count of dupliacted field values in an internal table . the scenario is like this

internal table 1 contains field1 with value x and the table2 contains field2 with repetaed value x

x

x

now i want to count the repeated values of field2 in table2.

please note we have tried at changed on sysntax but not luck we want to acheive this in oo context.

Thanks

krishna.Y