sql 从select中插入，通过避免循环（避免循环）使用连接仅插入缺失的记录

Posted 2021-05-14

IF @IsAssigning = 1
	BEGIN
		INSERT INTO [dbo].[ProductMapping] ([ProductId], [OrganizationId], [ProductSeriesId], [CenterXPGUXSkillId], [IsActive], [CreatedBy], [CreatedDate])
		SELECT tbl.ProductId, @OrganizationId, tbl.ProductSeriesId, @SkillId, 1, @UserId, GETDATE()
		FROM @tblProducts tbl
		WHERE tbl.ProductId NOT IN (
				SELECT PM.ProductId
				FROM ProductMapping PM WITH (NOLOCK)
				WHERE PM.IsActive = 1
					AND pm.OrganizationId = @OrganizationId
					AND pm.CenterXPGUXSkillId = @SkillId
				)
	END
	
	or --Best
	
	INSERT INTO dbo.TCIAssessmentResultSummary (AssessmentMode, UserId, ActivityId, Rating, AppearedDate, Isactive)
		SELECT 'NA', tbl.UserId, tbl.ActivityId, tbl.Rating, GETDATE(), 1
		FROM #TEMP tbl
		WHERE NOT EXISTS (
				SELECT 1
				FROM TCIAssessmentResultSummary A
				WHERE A.UserId = tbl.UserId
					AND A.ActivityId = tbl.ActivityId
					AND Isactive = 1
				)