To help you learn to code the SELECT statement, this chapter starts by presenting its basic syntax. Next, it presents several examples that will give you an idea of what you can do with this statement. Then, the
TheSELECTstatement is used to select data from a database. ExampleGet your own SQL Server Return data from the Customers table: SELECTCustomerName, CityFROMCustomers; Try it Yourself » Syntax SELECTcolumn1,column2, ... FROMtable_name; ...
Example asc An option on the order by or group by clause. The sorting is ascending. (Sort is ascending by default.) select * from custTable order by Name asc; avg Returns the average of the fields. CustTable custTable; ; select avg(value) from custTable; ...
Different clauses can be used with the “SELECT INTO” statement to perform different operations on the tables, such as the WHERE, INNER JOIN, GROUP BY, etc. How Does the SELECT INTO Statement Work in Postgres? The working of the SELECT INTO statement is illustrated below: - First, it s...
This example returns only the rows for Product that have a product line of R and that have days to manufacture that is less than 4. SQL Copy USE AdventureWorks2022; GO SELECT Name, ProductNumber, ListPrice AS Price FROM Production.Product WHERE ProductLine = 'R' AND DaysToManufacture < ...
The minimum syntax for a SELECT statement is: SELECTfieldsFROMtable 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...
An if statement without an else part executes its body only if a Boolean expression evaluates to true, as the following example shows: C# Copy Run DisplayMeasurement(45); // Output: The measurement value is 45 DisplayMeasurement(-3); // Output: Warning: not acceptable value! The measuremen...
This example returns only the rows forProductthat have a product line ofRand that have days to manufacture that is less than4. SQL USEAdventureWorks2022; GOSELECTName, ProductNumber, ListPriceASPriceFROMProduction.ProductWHEREProductLine ='R'ANDDaysToManufacture <4ORDERBYNameASC; GO ...
Now that you've seen what each clause does, let's look at the order in which SQL Server actually evaluates them:The FROM clause is evaluated first, to provide the source rows for the rest of the statement. A virtual table is created and passed to the next step. The WHERE clause is ...
Just add a WHERE clause that causes the query to return no data:SELECT * INTO newtableFROM oldtableWHERE 1 = 0; Exercise? What is the primary purpose of the SQL SELECT INTO statement? To update data in an existing table To copy data from one table into a new table To delete data ...