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NEW QUESTION: 1
dbo.Salesという名前のテーブルを含むデータベースがあります。 テーブルには20億行あります。 次のTransact-SQLステートメントを実行してテーブルを作成しました。

dbo.Salesに対して次のクエリを実行します。 すべてのクエリはパフォーマンスがよくありません。

テーブルにデータを入力するETLプロセスは、一括挿入を使用して毎日1000万行をロードします。 このプロセスでは現在、レコードをロードするのに6時間かかります。
払い戻し列の値は、テーブル内の行の0.01％のみに対して1に等しくなります。 他のすべての行では、返金列の値は0です。
クエリとETLプロセスのパフォーマンスを最大限に高める必要があります。
各クエリにどのインデックスタイプを使用しますか？ 回答するには、回答領域で適切なインデックスの種類を選択します。
注：それぞれ正しい選択は1ポイントの価値があります。

Answer:
Explanation:

Explanation

Query1: Nonclustered Index
The query include a date range.
If you have included columns in your index, then the leaf level page of your non-clustered index contains the columns as defined in the nonclustered index the clustering key column(s) all those additional columns as defined in your INCLUDE statement.
Query2: Clustered columnstore index
Columnstore index is a new type of index introduced in SQL Server 2012. It is a column-based non-clustered index geared toward increasing query performance for workloads that involve large amounts of data, typically found in data warehouse fact tables.
Query3: Filtered nonclustered index
* When a column only has a small number of relevant values for queries, you can create a filtered index on the subset of values. For example, when the values in a column are mostly NULL and the query selects only from the non-NULL values, you can create a filtered index for the non-NULL data rows. The resulting index will be smaller and cost less to maintain than a full-table nonclustered index defined on the same key columns.
When a table has heterogeneous data rows, you can create a filtered index for one or more categories of data.
This can improve the performance of queries on these data rows by narrowing the focus of a query to a specific area of the table. Again, the resulting index will be smaller and cost less to maintain than a full-table nonclustered index.
References:
https://docs.microsoft.com/en-us/sql/relational-databases/indexes/create-filtered-indexes
https://logicalread.com/sql-server-columnstore-index-w02/#.XRo06egzaUk

NEW QUESTION: 2
The Prioritize component always outputs
A. top 3 offers
B. top 1 offer
C. on arbitrary number of offers
D. all eligible offers
Answer: D

NEW QUESTION: 3
ある企業が、業界標準の独自のデータソースを使用するPower Platformアプリを作成することを計画しています。
次の各ステートメントについて、ステートメントがtrueの場合は[はい]を選択します。それ以外の場合は、[いいえ]を選択します。
注：それぞれの正しい選択は1ポイントの価値があります。

Answer:
Explanation:

Explanation

Reference:
https://docs.microsoft.com/en-us/powerapps/maker/canvas-apps/connections-list

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