Database Administration (MOSC)

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Index Creation - 19c

in Database Administration (MOSC) 2 commentsAnswered ✓

Hi Team,

Need your guidance, whether creating index on table XXTTD_APEX_EMBOOK_HDR_TAB on columns HDR.EMBOOK_HEADER_ID and HDR.status will improve the performance, if yes kindly,please let us know the order of columns. There is no histogram on any of these columns.

SELECT /*+ GATHER_PLAN_STATISTICS */ HDR.EMBOOK_HEADER_ID
, APRV.MAX_APRV_REQUEST_ID MAX1_APRV
, SUB.MAX_SUB_REQUEST_ID MAX2_SUB
FROM XX_APEX.XXTTD_APEX_EMBOOK_HDR_TAB HDR
LEFT JOIN ( SELECT BILL_HEADER_ID
, MAX(REQUEST_ID) AS MAX_APRV_REQUEST_ID
FROM XX_APEX.XXTTD_AP_EMBOOK_APRVL_TRNS_TAB

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