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Re-writing a query interms of performance - response (5) by bikky6

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For CUST_T

Date Time Unique Values Column Names
13/11/24 1:57:25 1,090 FIRST_DT
13/11/24 1:58:15 163,402,379 VISITOR_ID
13/11/24 1:58:39 4,192,811 CUST_ID
13/11/24 1:58:52 4 DOMN_ID
13/11/28 5:28:33 1,367,554,969 FIRST_DT,VISITOR_ID,CUST_ID
13/11/27 20:37:06 1,094 PARTITION
13/11/24 2:01:55 1,105,915,258 FIRST_DT,VISITOR_ID

For KEY_T

Date Time Unique Values Column Names
13/11/02 23:26:44 1,069 DW_CREAT_DT
13/11/02 23:27:56 163,402,379 VISITOR_ID
13/11/02 23:38:49 856,216,070 SRCE_VISITOR_ID
13/11/02 23:39:50 1,086,403,953 DW_CREAT_DT,VISITOR_ID

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