Which clause is mandatory in SQL?
The SQL Select Statement:Microsoft Access is a Visual Basic based application that allows the SQL statements to be embedded in VBA code and macros. One of the most used SQL statements, the SELECT statement, provides the much needed flexibility in the retrieval of data from a database. The general form of the SELECT command is: Show
The select statement, like all other SQL statements, should end with a semi-colon. The semi-colon terminates a statement. If you wanted to select an entire table, every record and every field, the command would be: SELECT * FROM source; or SELECT ALL FROM source;The absence of the WHERE clause signifies that there are no restrictions to be placed on the rows, so display all rows. This query statement can be further modified to indicate specific fields (or columns) and specific records (or rows) to retrieve, and also set limitations on, the queried results using the WHERE clause. The absence of the GROUP BY, HAVING and ORDER BY clauses signifies that there are no particulars restrictions to be put on the output of the query. The optional conditions may make use of comparison operators, which include the following: COMPARISON OPERATORS
Aggregate functions can be included to perform computations on numeric values. Aggregate functions include the following: AGGREGATE FUNCTIONS
This set of MySQL Multiple Choice Questions & Answers (MCQs) focuses on “The select Clauses – 1”. 1. What is the meaning of “SELECT” clause in Mysql?
Answer: a 2. Which of the following clause is evaluated in the last by database server? Answer: a 3. What will be the output of the following SQL statement? a) Show all rows and columns of
table “person” Answer:a 4. What will be the output of of the following SQL statement? SELECT person_id, Fname, lname FROM person; a) Show only columns (person_id, Fname, lname) and rows related to these columns Answer: a 5. Can “SELECT” clause be used without the clause “FROM”? Answer: b 6. Find the error in the following SQL statement? a) No Error Answer: b 7. What will be the output of the following SQL statement? SELECT * FROM person WHERE person_id=1; a) Show all columns but only those rows which belongs to person_id=1 Answer: a 8. What will be the output of the following SQL statement? SELECT person_id, fname, lname FROM person WHERE person_id=1; a) Show only columns(person_id, fname, lname) but only those rows which belongs to person_id=1 Answer: a 9. Which clause is mandatory with clause “SELECT” in Mysql? Answer: a Sanfoundry Global Education & Learning Series – MySQL Database. To practice all areas of MySQL Database, here is complete set of 1000+ Multiple Choice Questions and Answers. Next Steps:
Manish Bhojasia, a technology veteran with 20+ years @ Cisco & Wipro, is Founder and CTO at Sanfoundry. He lives in Bangalore, and focuses on development of Linux Kernel, SAN Technologies, Advanced C, Data Structures & Alogrithms. Stay connected with him at LinkedIn. Subscribe to his free Masterclasses at Youtube & technical discussions at Telegram SanfoundryClasses. Which of the following clauses are mandatory in a SQL query?Which of the following clauses are mandatory in an SQL query? Answer: A. SELECT and FROM are the mandatory clauses in a SELECT query.
What two clauses are mandatory in a SELECT statement?Each SQL query statement must contain both a SELECT and a FROM clause. The combination of these two clauses determine the table columns that are searched by the query. The WHERE clause and other advanced clauses further limit data retrieval to specific table rows.
What are the 3 main clauses of a SQL statement?SQL clauses. CONSTRAINT clause.. FOR UPDATE clause.. FROM clause.. GROUP BY clause.. HAVING clause.. ORDER BY clause.. The result offset and fetch first clauses.. USING clause.. What is an optional clause in SQL?Specifies that the indicated query hint should be used throughout the entire query. Each query hint can be specified only one time, although multiple query hints are permitted. Only one OPTION clause can be specified with the statement. This clause can be specified in the SELECT, DELETE, UPDATE and MERGE statements.
|
