COMPUTER SCIENCE AND ENGINEERING
SQL
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
Select * from “Database”
|
|
|
Select * from “Name table";
|
|
|
SELECT * from “Name table”
|
|
|
Select * from “name Database";
|
Detailed explanation-1: -The SELECT statement is used to select data from a database. The data returned is stored in a result table, called the result-set.
Detailed explanation-2: -The syntax to get all table names with the help of SELECT statement. mysql> use test; Database changed mysql> SELECT Table name as TablesName from information schema. tables where table schema = ‘test’; Output with the name of the three tables.
Detailed explanation-3: -The * operator represents all the columns of a table. So, you don’t need to specify each column name in the SELECT query to get data from all the columns. SELECT * FROM Employee; The above query returns all the rows and columns data from the Employee table, as shown below.
Detailed explanation-4: -#mytable is a temporary table where as mytable is a concrete table. You can read more about Temporary Tables in SQL Server. They are used most often to provide workspace for the intermediate results when processing data within a batch or procedure.