API в Java EE
Which of the following is a SQL aggregate function?
The following are the most commonly used SQL aggregate functions: AVG – calculates the average of a set of values. COUNT – counts rows in a specified table or view. MIN – gets the minimum value in a set of values.
Which of the following belongs to an aggregate function?
Which among the following belongs to an “aggregate function”? … Explanation: “GROUP BY” is used with aggregate functions. 8.
Which of the following is not SQL aggregate function Mcq?
1. Which of the following is not a built in aggregate function in SQL? Explanation: SQL does not include total as a built in aggregate function. The avg is used to find average, max is used to find the maximum and the count is used to count the number of values.
Which of the following is a SQL aggregate function * 1 point?
AVG is a SQL aggregate function which calculates the average of numbers.
WHERE is aggregate function?
An aggregate function can be used in a WHERE clause only if that clause is part of a subquery of a HAVING clause and the column name specified in the expression is a correlated reference to a group. If the expression includes more than one column name, each column name must be a correlated reference to the same group.
Is Top an aggregate function in SQL?
Commonly used aggregate functions include: AVG() – Used for returning an average value. COUNT() – Used for returning the count of value(s) TOP() – Used for returning the top (first) value.
Is mean an aggregate function in SQL?
In database management, an aggregate function or aggregation function is a function where the values of multiple rows are grouped together to form a single summary value. Common aggregate functions include: Average (i.e., arithmetic mean) Count.
What is the main MySQL program that does all the data handling is called?
–> The main MySQL program that does all the data handling is called mysqld.
What is the correct format to select Emp_name in ascending order?
Explanation: Sorting in ascending or descending order depends on keyword “DESC” and “ASC”. 4. What will be the order of sorting in the following MySQL statement? Explanation: In the query, first “emp_id” will be sorted then emp_name with respect to emp_id.
Is SELECT an aggregate function?
An aggregate function performs a calculation on a set of values, and returns a single value. Except for COUNT(*) , aggregate functions ignore null values. … Use aggregate functions as expressions only in the following situations: The select list of a SELECT statement (either a subquery or an outer query).
Is round an aggregate function?
It takes two arguments: a number, and a number of decimal places. It can be combined with other aggregate functions, as shown in the given query. This query will calculate the average rating of movies from 2015, rounding to 2 decimal places.
What is the function of inner join Mcq?
What is the function of inner join? Explanation: The join operations that do not retain mismatched tuples are called as inner join operations. The inner join operation does not preserve any tuples on either side of the relation.
What is the use of insert command in SQL?
Insert is a widely-used command in the Structured Query Language (SQL) data manipulation language (DML) used by SQL Server and Oracle relational databases. The insert command is used for inserting one or more rows into a database table with specified table column values.
Which of the following is correct regarding aggregate function?
Which of the following is an aggregate function in SQL?
|Q.||Which of the following is correct regarding Aggregate functions?|
|D.||it takes a single value and returns a single value as result|
|Answer» a. it takes a list of values and return a single values as result|
How can we insert data into a view?
You can insert rows into a view only if the view is modifiable and contains no derived columns. The reason for the second restriction is that an inserted row must provide values for all columns, but the database server cannot tell how to distribute an inserted value through an expression.