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Power BIbi_tool~5 mins

SQL Server connection in Power BI - Cheat Sheet & Quick Revision

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Recall & Review
beginner
What is the first step to connect Power BI to a SQL Server database?
Open Power BI Desktop, then click on 'Get Data' and select 'SQL Server' as the data source.
Click to reveal answer
beginner
What information do you need to provide to connect to a SQL Server in Power BI?
You need the server name (or IP address), the database name (optional), and your authentication method (Windows or SQL Server authentication).
Click to reveal answer
beginner
What authentication methods can you use to connect Power BI to SQL Server?
You can use Windows Authentication (uses your Windows login) or SQL Server Authentication (requires username and password).
Click to reveal answer
intermediate
Why is it important to choose the right data connectivity mode in Power BI when connecting to SQL Server?
Because Import mode loads data into Power BI for fast analysis, while DirectQuery queries the database live, affecting performance and freshness.
Click to reveal answer
intermediate
How can you ensure your SQL Server connection in Power BI is secure?
Use encrypted connections, strong passwords, and limit user permissions on the SQL Server database.
Click to reveal answer
Which option do you select first in Power BI Desktop to connect to SQL Server?
ANew Measure
BTransform Data
CPublish
DGet Data
What is NOT required when connecting to SQL Server in Power BI?
AAuthentication method
BDatabase name
CPower BI license key
DServer name
Which authentication method uses your Windows login credentials?
ASQL Server Authentication
BWindows Authentication
COAuth Authentication
DAnonymous Authentication
What does DirectQuery mode do in Power BI when connected to SQL Server?
AQueries data live from SQL Server
BImports data into Power BI
CExports data to Excel
DCreates a backup of the database
Which practice helps secure your SQL Server connection in Power BI?
AUsing encrypted connections
BSharing credentials publicly
CUsing weak passwords
DAllowing all users full access
Explain the steps to connect Power BI Desktop to a SQL Server database.
Think about what you do from opening Power BI to loading data.
You got /7 concepts.
    Describe the difference between Import mode and DirectQuery mode when connecting to SQL Server in Power BI.
    Consider how data is accessed and updated in each mode.
    You got /5 concepts.

      Practice

      (1/5)
      1. What is the main purpose of connecting Power BI to a SQL Server database?
      easy
      A. To import or query data directly for creating reports
      B. To design the SQL Server database schema
      C. To write SQL Server stored procedures
      D. To backup the SQL Server database

      Solution

      1. Step 1: Understand Power BI data sources

        Power BI connects to data sources like SQL Server to get data for reports.

      2. Step 2: Identify the purpose of connection

        The connection allows importing or querying data to visualize it in Power BI.

      3. Final Answer:

        To import or query data directly for creating reports -> Option A

      4. Quick Check:

        Power BI connection = data import/query [OK]
      Hint: Power BI connects to get data, not to manage database [OK]
      Common Mistakes:
      • Confusing Power BI with database design tools
      • Thinking connection is for database backup
      • Assuming Power BI writes SQL code
      2. Which of the following is the correct way to specify the server name when connecting Power BI to SQL Server?
      easy
      A. ServerName/InstanceName
      B. ServerName\InstanceName
      C. ServerName-InstanceName
      D. ServerName.InstanceName

      Solution

      1. Step 1: Recall SQL Server instance naming

        SQL Server uses backslash \ to separate server and instance names.

      2. Step 2: Match correct syntax

        The correct format is ServerName\InstanceName, not with slashes or dots.

      3. Final Answer:

        ServerName\InstanceName -> Option B

      4. Quick Check:

        SQL Server instance separator = \ [OK]
      Hint: Use backslash \ between server and instance [OK]
      Common Mistakes:
      • Using forward slash or dot instead of backslash
      • Omitting instance name when required
      • Adding spaces around the backslash
      3. You connect Power BI to SQL Server using DirectQuery mode. What happens when you refresh the report visuals?
      medium
      A. Power BI imports all data again from SQL Server
      B. Power BI uses cached data and does not query SQL Server
      C. Power BI queries the SQL Server live for updated data
      D. Power BI disconnects from SQL Server after refresh

      Solution

      1. Step 1: Understand DirectQuery mode

        DirectQuery mode means Power BI sends live queries to the database on demand.

      2. Step 2: Identify refresh behavior

        Refreshing visuals triggers live queries to SQL Server for current data.

      3. Final Answer:

        Power BI queries the SQL Server live for updated data -> Option C

      4. Quick Check:

        DirectQuery = live queries on refresh [OK]
      Hint: DirectQuery means live data queries, not cached data [OK]
      Common Mistakes:
      • Confusing DirectQuery with Import mode
      • Thinking refresh always imports all data
      • Assuming Power BI disconnects after refresh
      4. You try to connect Power BI to SQL Server but get an error: "Cannot connect to server." What is the most likely cause?
      medium
      A. Incorrect server or database name entered
      B. Power BI does not support SQL Server connections
      C. Your computer is offline but server is reachable
      D. You forgot to install Power BI Desktop

      Solution

      1. Step 1: Check connection error meaning

        "Cannot connect to server" usually means wrong server or database info.

      2. Step 2: Rule out other causes

        Power BI supports SQL Server; offline computer means no connection; Power BI Desktop must be installed.

      3. Final Answer:

        Incorrect server or database name entered -> Option A

      4. Quick Check:

        Connection error = wrong server/database name [OK]
      Hint: Double-check server and database names for typos [OK]
      Common Mistakes:
      • Assuming Power BI lacks SQL Server support
      • Ignoring network or firewall issues
      • Not verifying Power BI installation
      5. You want to create a Power BI report that always shows the latest sales data from SQL Server without importing all data each time. Which connection mode should you choose and why?
      hard
      A. DirectQuery, because it imports all data once
      B. Import, because it loads all data once and never updates
      C. Import, because it queries live data on demand
      D. DirectQuery, because it queries live data on demand

      Solution

      1. Step 1: Understand Import vs DirectQuery

        Import loads data once; DirectQuery queries live data each time.

      2. Step 2: Choose mode for latest data without full import

        DirectQuery fits because it fetches current data without importing all.

      3. Final Answer:

        DirectQuery, because it queries live data on demand -> Option D

      4. Quick Check:

        Latest data without import = DirectQuery [OK]
      Hint: Use DirectQuery for live data, Import for snapshot [OK]
      Common Mistakes:
      • Confusing Import with live querying
      • Choosing Import when data freshness is needed
      • Misunderstanding DirectQuery behavior
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