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What else can I help you with?
When you want to extract data from two or more tables you use an query?
When you want to extract data from two or more tables, you can use a SQL JOIN query. By using JOIN clauses, you can combine rows from different tables based on a related column between them. This allows you to retrieve data from multiple tables in a single query.
What is the use of query by example?
A query by example is where you fill in data that in effect acts like a sample of what you want the query to retrieve. So if you have a set of data of employees and want to show ones that work in a particular department, you would type the name of the department into the query to correspond to the field that shows the department. So in the query, you would have chosen your fields, and in the criteria under the department field you might type something like "Sales", indicating that you want records that have "Sales" in the department field. What you type in acts as an example of the data you want to get. You could use lots of criteria in different ways and build more complex queries, but still using a query by example approach.
Selecting data by means of a query?
To select data using a query, you need to use a SELECT statement in SQL. Specify the columns you want to retrieve data from and the table where the data is located. You can also apply conditions using WHERE clause to filter the data before retrieving it.
What information is needed in a query?
In a query, you typically need to specify the data you want to retrieve, the conditions that should be met for the data to be included, and any sorting or grouping instructions. Additionally, you may need to specify the data source or table from which the data should be retrieved.
Why database system support data manipulation using a declarative query languages?
Declarative query languages allow users to specify what data they want without specifying how to retrieve it. This abstraction simplifies the querying process and allows for optimization by the database system to determine the most efficient way to execute the query. It also enhances portability and adaptability by separating the query logic from the database structure.
What are the advantages and disadvantages of using a web query?
allows you access at anytime and you can refresh the data as-well
What is a nested query?
It is a query inside another query. Sometimes we might use one query to reduce down the amount of data to go through and then use another query based on the output of that query to get what you want. The first query is inside or nested in the first query.
When might you want to use this system of data capture?
This question needs more context
When you want to extract data from two or more tables you use an query?
When you want to extract data from two or more tables, you can use a SQL JOIN query. By using JOIN clauses, you can combine rows from different tables based on a related column between them. This allows you to retrieve data from multiple tables in a single query.
When you want to build a form for a subset of data you can base the form on what?
Query
What is the use of query by example?
A query by example is where you fill in data that in effect acts like a sample of what you want the query to retrieve. So if you have a set of data of employees and want to show ones that work in a particular department, you would type the name of the department into the query to correspond to the field that shows the department. So in the query, you would have chosen your fields, and in the criteria under the department field you might type something like "Sales", indicating that you want records that have "Sales" in the department field. What you type in acts as an example of the data you want to get. You could use lots of criteria in different ways and build more complex queries, but still using a query by example approach.
When might you want to use sensor capture physical data?
when ya suckkk ya mom ygm fham :P
What is the best source to create form should it from query or table?
There is no definitive answer to that, as it depends what you want on the form. Ultimately all data comes from tables. If you just want to show all the records as they are you could base the form on the table. However if you want to display only selected records or certain calculations, you might create a query to do those operations and then base the form on the query.
What is on a Data Capture form?
Whatever data you want to capture i.e. name, address, shoe size, school, age etc.
Selecting data by means of a query?
To select data using a query, you need to use a SELECT statement in SQL. Specify the columns you want to retrieve data from and the table where the data is located. You can also apply conditions using WHERE clause to filter the data before retrieving it.
What information is needed in a query?
In a query, you typically need to specify the data you want to retrieve, the conditions that should be met for the data to be included, and any sorting or grouping instructions. Additionally, you may need to specify the data source or table from which the data should be retrieved.
Why database system support data manipulation using a declarative query languages?
Declarative query languages allow users to specify what data they want without specifying how to retrieve it. This abstraction simplifies the querying process and allows for optimization by the database system to determine the most efficient way to execute the query. It also enhances portability and adaptability by separating the query logic from the database structure.
