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allows you to ask a question based on one or more tables in a database
What else can I help you with?
What can a select query do?
Select query come under the category of DRL (data retrieval language). A select query is used to retrieve data from DB.
What is a select query?
Select query is a DRL. DRL stands for Data retrieval language. Example select * from table_name;
What is select query?
Select query is a DRL. DRL stands for Data retrieval language. Example select * from table_name;
What is a complex query in Microsoft access?
A select query with multiple criteria
What does a query allow you to do on a database?
a query allows you to select certain data
How do you return multiple columns from sub-query?
To return multiple columns from a sub-query, you can include the sub-query in the SELECT statement of your main query. For example, you can use the sub-query in the FROM clause or as a derived table, specifying the columns you want to select. Ensure that the sub-query is properly formatted to return the desired columns, and you can alias it if necessary to improve readability. Here's a basic example: SELECT a.column1, a.column2 FROM (SELECT column1, column2 FROM table_name WHERE condition) AS a;
When do you perform denormalization?
Generally to optimize the performance of select query. To minimize joins used in the query.
What does a query do on a database?
it allows you to select certain data
How do I create a SQL Select query that will return the number of columns not rows in my query result. So if my query returns 1 row with 5 columns I want the query to generate the number 5.?
I have the same question but well a not-so-elegant solution would be to define a view within your DBMS e.g. CREATE VIEW view_name AS (SELECT ...your_query) and then apply a SELECT COUNT(*) FROM view_name
What is a query that extracts data from a table which meets certain specified criteria?
If the criteria is entered in by the user as the query is run, by prompting the user, then it is a Parameter query. Criteria can also be built direct into the query in which case it is a standard Select query.
A type of query that retrieves data from one or more tables and makes it available for use in the format of a datasheet is a?
Select Query
What type of query that retrieves data from one or more tables and makes it available for use in the format of a datasheet is a what Query?
select
