Lesson 11


Queries in Base

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1. What is a Query in LibreOffice Base? (LibreOffice Base-āϤ Query āĻ•ি?)
Answer: A Query is a request to retrieve specific data from a database. It helps in filtering, sorting, and analyzing data efficiently.
(Query āĻšāϞ āĻāĻ• āĻŦিāĻļেāώ āĻ…āύুā§°োāϧ, āϝি⧟ে Database-ā§° āĻĒā§°া āύিāϰ্āĻĻিāώ্āϟ āϤāĻĨ্āϝ āωāϞি⧟াāχ āφāύে। āχ āĻĄাāϟা āϏ⧰āϞীāϕ⧰āĻŖ, filtering, āφ⧰ু āĻŦিāĻļ্āϞেāώāĻŖ āϕ⧰াāϤ āϏāĻšা⧟ āϕ⧰ে।)

2. What are the different types of Queries in LibreOffice Base? (LibreOffice Base-āϤ Query-ā§° āĻĒ্ā§°āĻ•াā§°āϏāĻŽূāĻš āĻ•ি?)
Answer: 1. Select Query
               2. Action Query
               3. Parameter Query 
               4.SQL Query
(LibreOffice Base-āϤ Select Query, Action Query, Parameter Query, āφ⧰ু SQL Query āĻĒ্ā§°āϧাāύāĻ•ৈ āĻŦ্āĻ¯ā§ąāĻšাā§° āϕ⧰া āĻšā§Ÿ।)

3. What is the purpose of a Select Query? (Select Query-ā§° āωāĻĻ্āĻĻেāĻļ্āϝ āĻ•ি?)
Answer: It retrieves specific data from one or more tables. It allows filtering and sorting data.
(Select Query-āĻ āĻāĻ•াāϧিāĻ• Table-ā§° āĻĒā§°া āύিāϰ্āĻĻিāώ্āϟ āϤāĻĨ্āϝ āωāϞি⧟াāχ āφāύে āφ⧰ু Filtering & Sorting āϕ⧰াāϤ āϏāĻšা⧟ āϕ⧰ে।)

4. What is an Action Query? (Action Query āĻ•ি?)

Answer: An Action Query makes changes to the database, such as inserting, updating, or deleting records.
 (Action Query-āĻ Database-āϤ āĻĒā§°িāĻŦāϰ্āϤāύ āφāύে, āϝেāύ Insert, Update, āφ⧰ু Delete āϕ⧰াāϤ āϏāĻšা⧟ āϕ⧰ে।)

5. What is a Parameter Query? (Parameter Query āĻ•ি?)

Answer: A Parameter Query asks for input from the user before running the query. It helps in retrieving dynamic results. 
(Parameter Query-āĻ Query āϚāϞোā§ąাā§° āφāĻ—āϤে User-ā§° āĻĒā§°া āχāύāĻĒুāϟ āĻŦিāϚাā§°ে, āϝাāϤে āĻĒā§°িā§ąāϰ্āϤāύāĻļীāϞ āĻĢāϞাāĻĢāϞ āωāϞি⧟াāχ āφāύিāĻŦ āĻĒাā§°ে।)

6. What is an SQL Query? (SQL Query āĻ•ি?)

Answer: SQL Query is written in Structured Query Language (SQL) to fetch or modify data directly. It provides more control over the database.
 (SQL Query āĻšāϞ Structured Query Language (SQL)-āϤ āϞিāĻ–া āĻāĻ• āĻĒ্ā§°āĻļ্āύ, āϝি⧟ে Database-ā§° āĻĒā§°া āϤāĻĨ্āϝ āωāϞি⧟াāχ āφāύে āĻŦা āĻĒā§°িāĻŦāϰ্āϤāύ āϕ⧰ে।)

7. How can you create a Query in LibreOffice Base? (LibreOffice Base-āϤ Query āĻ•েāύেāĻ•ৈ āϏৃāώ্āϟি āϕ⧰িāĻŦ?)

Answer: Open LibreOffice Base → Click on Queries → Use Wizard or SQL Mode to create a query. 
(LibreOffice Base āĻ–ুāϞāĻ• → Queries-āϤ āĻ•্āϞিāĻ• āϕ⧰āĻ• → Wizard āĻŦা SQL Mode āĻŦ্āĻ¯ā§ąāĻšাā§° āϕ⧰ি Query āϏৃāώ্āϟি āϕ⧰āĻ•।)

8. What is the difference between a Table and a Query? (Table āφ⧰ু Query-ā§° āĻŽাāϜāϤ āĻĒাā§°্āĻĨāĻ•্āϝ āĻ•ি?)

Answer:
Table: Stores raw data permanently.
Query: Retrieves and processes data temporarily.
(Table-āϤ āϏ্āĻĨা⧟ীāĻ­াā§ąে Data āĻĨাāĻ•ে, Query-āĻ āϏāĻŽā§Ÿী⧟াāĻ•ৈ Data āωāϞি⧟াāχ āφāύে āφ⧰ু āĻĒ্ā§°āĻļোāϧāύ āϕ⧰ে।)

9. What is Sorting in Queries? (Query-āϤ Sorting āĻ•ি?)

Answer: Sorting arranges data in ascending or descending order. 
(Sorting-āĻ Data-āĻ•ে ascending āĻŦা descending ā§°ীāϤি āĻ…āύুāϏ⧰ি āϏāϜাāχ āĻĻি⧟ে।)

10. What is Filtering in Queries? (Query-āϤ Filtering āĻ•ি?)

Answer: Filtering displays only specific records based on given conditions. 
(Filtering-āĻ āύিāĻĻিāώ্āϟ āĻļāϰ্āϤ āĻ…āύুāϏ⧰ি āĻ•েā§ąāϞ āύিāϰ্āĻĻিāώ্āϟ data āĻĻেāĻ–ুā§ąা⧟।)

11. What are Aggregate Functions in Queries? (Query-āϤ Aggregate Functions āĻ•ি?)

Answer: Aggregate Functions perform calculations on multiple records.
Examples: SUM(), AVG(), COUNT(), MAX(), MIN().
(Aggregate Functions-āĻ āĻāĻ•াāϧিāĻ• Record-ā§° āĻ“āĻĒā§°āϤ āĻ—āĻŖāύাā§° āĻ•াāϜ āϕ⧰ে। āωāĻĻাāĻšā§°āĻŖ: SUM(), AVG(), COUNT(), MAX(), MIN()।)

12. What is the purpose of the WHERE clause in a Query? (Query-āϤ WHERE Clause-ā§° āωāĻĻ্āĻĻেāĻļ্āϝ āĻ•ি?)

Answer: The WHERE clause is used to specify conditions in a query.
(WHERE Clause-āĻ Query-āϤ āύিā§°্āĻĻিāώ্āϟ āĻļāϰ্āϤ āωāϞ্āϞেāĻ– āϕ⧰িāĻŦāϞৈ āĻŦ্āĻ¯ā§ąāĻšাā§° āϕ⧰া āĻšā§Ÿ।)

13. What is the difference between the HAVING and WHERE clause? (HAVING āφ⧰ু WHERE Clause-ā§° āĻŽাāϜāϤ āĻĒাā§°্āĻĨāĻ•্āϝ āĻ•ি?)

Answer: WHERE: Used before grouping data. 
               HAVING: Used after grouping data.
(WHERE-āĻ Group āϕ⧰াā§° āφāĻ—āϤেāχ āĻļāϰ্āϤ āĻĒ্⧰⧟োāĻ— āϕ⧰ে, āφ⧰ু HAVING-āĻ Group āϕ⧰াā§° āĻĒাāĻ›āϤ āĻļāϰ্āϤ āĻĒ্⧰⧟োāĻ— āϕ⧰ে।)

14. What is the use of the ORDER BY clause in Queries? (Query-āϤ ORDER BY Clause-ā§° āĻŦ্āĻ¯ā§ąāĻšাā§° āĻ•ি?)

Answer: ORDER BY sorts query results in ascending or descending order. 
(ORDER BY-āĻ Query-ā§° āĻĢāϞাāĻĢāϞ ascending āĻŦা descending ā§°ূāĻĒāϤ āϏāϜাāχ āĻĻেāĻ–ুā§ąা⧟।)

15. What is the advantage of using Queries in a database? (Database-āϤ Query āĻŦ্āĻ¯ā§ąāĻšাā§°ā§° āϏুāĻŦিāϧা āĻ•ি?)
Answer:

  • It helps retrieve specific data quickly.

  • It reduces manual searching.

  • It allows data analysis and reporting.
    (Query-āĻ āĻĻ্ā§°ুāϤ āĻĄাāϟা āωāϞি⧟াāχ āφāύে, āĻšāϏ্āϤāϚাāϞিāϤ āϏāύ্āϧাāύ⧰ āĻĒ্⧰⧟োāϜāύ āύাāĻĨাāĻ•ে, āφ⧰ু āĻĄাāϟা āĻŦিāĻļ্āϞেāώāĻŖ & āĻĒ্ā§°āϤিāĻŦেāĻĻāύ āϤৈ⧟াā§° āϕ⧰াāϤ āϏāĻšা⧟ āϕ⧰ে।)






EDIT BY: KRISHNA SAIKIA