SQL : How to use approx_count_distinct to count distinct combinations of two columns in a Spark Data

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SQL : How to use approx_count_distinct to count distinct combinations of two columns in a Spark DataFrame?
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SQL : How to use approx_count_distinct to count distinct combinations of two columns in a Spark DataFrame?
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to use distinct SQL How to columns of DataFrame? a in : combinations two count Spark approx_count_distinct



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