Which of the following symbols used to SELECT all columns or fields in a table?

Q: Which symbol is used to SELECT all the rows from the table?

Asterisk (42): A wildcard, indicating all” in the following cases: In SELECT retrieve all columns: SELECT * FROM table. In COUNT, count all rows (including nulls and duplicates).

Q: Which of the following is used to SELECT all the columns of a table in SQL?

SELECT column1, column2 FROM table1, table2 WHERE column2=value; In the above SQL statement: The SELECT clause specifies one or more columns to be retrieved; to specify multiple columns, use a comma and a space between column names. To retrieve all columns, use the wild card * (an asterisk).

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The SQL SELECT Statement
SELECT Syntax
Demo Database
SELECT Column Example
SELECT * Example
Test Yourself With Exercises
Which symbol is used to SELECT all the columns from a table?
Which symbol is used to SELECT all the rows from the table?
Which of the following is used to SELECT all the columns of a table in SQL?
Which of the following commands is used to get all the columns in a table?

The SELECT statement Instructs the Microsoft Access database engine to return information from the database as a set of records.

Syntax

SELECT [predicate] { * | table.* | [table.]field1 [AS alias1] [, [table.]field2 [AS alias2] [, ...]]}
FROM tableexpression [, ...] [IN externaldatabase]
[WHERE... ]
[GROUP BY... ]
[HAVING... ]
[ORDER BY... ]
[WITH OWNERACCESS OPTION]

The SELECT statement has these parts:

Part	Description
predicate	One of the following predicates: ALL, DISTINCT, DISTINCTROW, or TOP. You use the predicate to restrict the number of records returned. If none is specified, the default is ALL.
*	Specifies that all fields from the specified table or tables are selected.
table	The name of the table containing the fields from which records are selected.
field1, field2	The names of the fields containing the data you want to retrieve. If you include more than one field, they are retrieved in the order listed.
alias1, alias2	The names to use as column headers instead of the original column names in table.
tableexpression	The name of the table or tables containing the data you want to retrieve.
externaldatabase	The name of the database containing the tables in tableexpression if they are not in the current database.

Remarks

To perform this operation, the Microsoft Access database engine searches the specified table or tables, extracts the chosen columns, selects rows that meet the criterion, and sorts or groups the resulting rows into the order specified.

SELECT statements do not change data in the database.

SELECT is usually the first word in an SQL statement. Most SQL statements are either SELECT or SELECT...INTO statements.

The minimum syntax for a SELECT statement is:

SELECT fields FROM table

You can use an asterisk (*) to select all fields in a table. The following example selects all of the fields in the Employees table:

SELECT * FROM Employees;

If a field name is included in more than one table in the FROM clause, precede it with the table name and the . (dot) operator. In the following example, the Department field is in both the Employees table and the Supervisors table. The SQL statement selects departments from the Employees table and supervisor names from the Supervisors table:

SELECT Employees.Department, Supervisors.SupvName FROM Employees INNER JOIN Supervisors WHERE Employees.Department = Supervisors.Department;

When a Recordset object is created, the Microsoft Access database engine uses the table's field name as the Field object name in the Recordset object. If you want a different field name or a name is not implied by the expression used to generate the field, use the AS reserved word. The following example uses the title Birth to name the returned Field object in the resulting Recordset object:

SELECT BirthDate AS Birth FROM Employees;

Whenever you use aggregate functions or queries that return ambiguous or duplicate Field object names, you must use the AS clause to provide an alternate name for the Field object. The following example uses the title HeadCount to name the returned Field object in the resulting Recordset object:

SELECT COUNT(EmployeeID) AS HeadCount FROM Employees;

You can use the other clauses in a SELECT statement to further restrict and organize your returned data. For more information, see the Help topic for the clause you are using.

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The SQL SELECT Statement

The SELECT statement is used to select data from a database.

The data returned is stored in a result table, called the result-set.

SELECT Syntax

SELECT column1, column2, ...
FROM table_name;

Here, column1, column2, ... are the field names of the table you want to select data from. If you want to select all the fields available in the table, use the following syntax:

SELECT * FROM table_name;

Demo Database

Below is a selection from the "Customers" table in the Northwind sample database:

CustomerID	CustomerName	ContactName	Address	City	PostalCode	Country
1	Alfreds Futterkiste	Maria Anders	Obere Str. 57	Berlin	12209	Germany
2	Ana Trujillo Emparedados y helados	Ana Trujillo	Avda. de la Constitución 2222	México D.F.	05021	Mexico
3	Antonio Moreno Taquería	Antonio Moreno	Mataderos 2312	México D.F.	05023	Mexico
4	Around the Horn	Thomas Hardy	120 Hanover Sq.	London	WA1 1DP	UK
5	Berglunds snabbköp	Christina Berglund	Berguvsvägen 8	Luleå	S-958 22	Sweden

SELECT Column Example

The following SQL statement selects the "CustomerName" and "City" columns from the "Customers" table:

SELECT * Example

The following SQL statement selects all the columns from the "Customers" table:

Test Yourself With Exercises

Exercise:

Insert the missing statement to get all the columns from the Customers table.

Start the Exercise

Which symbol is used to SELECT all the columns from a table?

Detailed Solution. The * symbol is used to see every column of a table.

Which symbol is used to SELECT all the rows from the table?

Asterisk (42): A wildcard, indicating “all” in the following cases: In SELECT retrieve all columns: SELECT * FROM table. In COUNT, count all rows (including nulls and duplicates).

Which of the following is used to SELECT all the columns of a table in SQL?

SELECT column1, column2 FROM table1, table2 WHERE column2='value'; In the above SQL statement: The SELECT clause specifies one or more columns to be retrieved; to specify multiple columns, use a comma and a space between column names. To retrieve all columns, use the wild card * (an asterisk).