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add VARIANCE function
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@@ -59,4 +59,5 @@ select Fld1, max(Fld2) as q from t1 group by Fld1 having q is not null;
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select Fld1, max(Fld2) from t1 group by Fld1 having max(Fld2) is not null;
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select Fld1, max(Fld2) from t1 group by Fld1 having avg(Fld2) is not null;
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select Fld1, max(Fld2) from t1 group by Fld1 having std(Fld2) is not null;
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select Fld1, max(Fld2) from t1 group by Fld1 having variance(Fld2) is not null;
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drop table t1;
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