查询:
SELECT Object1.Column1, Object2.Column2 AS Column3, Object2.Column4 AS Column5,
Object3.Column6, Object3.Column7,Object1.Column8, Object1.Column9,
Object1.Column10, Object1.Column11, Object1.Column12, Object1.Column13,
Object1.Column14, Object1.Column15 as Column15, Object1.Column16,
Object4.Column4 AS Column17, Object4.Column2 AS Column18, Object1.Column19,
Object1.Column20, Object1.Column21, Object1.Column22, Object1.Column23,
Object1.Column24, Object1.Column25, Object1.Column26, Object5.Column4,
Object1.Column27, Object1.Column28, Object1.Column29, Object3.Column30,
Object3.Column1 as Column31, Object3.Column32 as Column33, Object1.Column34
as Column34, ? AS Column35 , Object3.Column36 as Column37
FROM Object6 AS Object1
INNER JOIN Object7 AS Object3 ON Object1.Column38 = Object3.Column1
INNER JOIN Object8 AS Object2 ON Object3.Column30 = Object2.Column1
LEFT JOIN …Run Code Online (Sandbox Code Playgroud) performance sql-server execution-plan sql-server-2017 query-performance