,D.[Score] B_Score ,'Distince'= CASE WHEN C.Score > D.Score THEN C.[Score] - D.[Score] WHEN C.Score < D.Score THEN D.[Score] - C.[Score] END FROM [tbiz_AssScoreAction] C INNER JOIN [tbiz_AssScoreAction] D ) = D.RelationID --等价语法 ,D.[Score] - C.Score…
mysql sql优化实例 优化前: pt-query-degist分析结果: # Query 3: 0.00 QPS, 0.00x concurrency, ID 0xDC6E62FA021C85B5 at byte 628331 # This item is included in the report because it matches --limit. # Scores: V/M = 0.19 # Time range: 2016-09-24T15:14:24 to 2016-10-0…
处于同一个域中的两台Sql server 实例无法连接,报的错误信息如下: A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is…