Explanation: “SELECT” clause is used to show rows and columns of a particular table and clause “from” is used to denote a table name.
What is the meaning of the select clause?
A SELECT statement retrieves zero or more rows from one or more database tables or database views. In most applications, SELECT is the most commonly used data manipulation language (DML) command. … SELECT clause is the list of columns or SQL expressions that must be returned by the query.
What is the meaning of select *?
to choose in preference to another or others; pick out. … of special value or excellence; choice. careful or fastidious in selecting; discriminating. carefully or fastidiously chosen; exclusive: a select group of friends.
What is XYZ in the following SQL statement?
What is xyz in the following SQL statement? Explanation: The operation being performed in the statement is the ‘DELETE’. The table name is ‘xyz’ and column name is ‘abc’. … The syntax also allows for deleting rows from multiple tables at once.
What is Csem in SQL?
The CHECK constraint is used to limit the value range that can be placed in a column. If you define a CHECK constraint on a table it can limit the values in certain columns based on values in other columns in the row. …
Is it SELECT or selected?
select or selected
Select means to choose one or more elements of a unique set, could be of items, ideas or options out of privilege. “I was asked to select the best out of the candidates.” Selected is the past tense of the word, select which means to have been chosen in the past. “James selected the clothes to wash.”
What is the purpose of having clause?
To complement a GROUP BY clause, use a HAVING clause to apply one or more qualifying conditions to groups after they are formed. The effect of the HAVING clause on groups is similar to the way the WHERE clause qualifies individual rows.
What is the meaning of SELECT city?
Select CITYWALK is a shopping centre located in the Saket District Centre (Sector-6, Pushp Vihar), in Saket, New Delhi. … The mall was developed by Select Infrastructure, a joint venture between the Select group and the Aarone Group.
Which clause is mandatory with clause select in MySQL?
Explanation: “SELECT” clause is used to show all rows and columns that are mention with the query. 5. Can “SELECT” clause be used without the clause “FROM”?
What are sub queries in SQL?
A Subquery or Inner query or a Nested query is a query within another SQL query and embedded within the WHERE clause. A subquery is used to return data that will be used in the main query as a condition to further restrict the data to be retrieved. … The BETWEEN operator cannot be used with a subquery.
WHERE clause is used in MySQL for?
The MySQL WHERE clause is used to filter the results from a SELECT, INSERT, UPDATE, or DELETE statement.
Why is select statement used in database?
SQLSELECT statements are used to retrieve data from the database and also, they populate the result of the query into the result-sets. The SQL examples of this article discourse and explain the fundamental usage of the SELECT statement in the queries.
What is a view Mcq?
This set of SQL Server Multiple Choice Questions & Answers (MCQs) focuses on “Views”. 1. … Explanation: VIEW is a virtual table, through which a selective portion of the data from one or more tables can be seen. A view do not contain data of their own.
How do I declare a constraint in SQL?
The constraint can be created within the CREATE TABLE T-SQL command while creating the table or added using ALTER TABLE T-SQL command after creating the table. Adding the constraint after creating the table, the existing data will be checked for the constraint rule before creating that constraint.