Re: Slow query in mysql 5.7.20
sdp_drs looks like the bottleneck: 2 million rows to read; counting an unindexed, nullable column; rows indexed and filtered on a column with a likely cardinality of 2. Is performance a lot better without the isduplicated=1 condition?
Despite the cardinality problem you might tempt the engine to use one of these these sdp_drp indexes ...
(accounteventid,isduplicated,adjustmentamount)
(isduplicated,adjustmentamount)
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