The above SELECT statement can also be written as"select first_name from students_details;" You can also retrieve data from more than one column. For example, to select first name and last name of all the stude
ClassMethod Select1() { s myquery = "SELECT latitude AS northsouth,longitude AS eastwest FROM Sample.USZipCode" s tStatement = ##class(%SQL.Statement).%New() s qStatus = tStatement.%Prepare(myquery) if qStatus '= 1 { w "%Prepare failed:" d $System.Status.DisplayError(qStatus) q...
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; ...
SQL SELECT Statement – Selecting individual fields from a table We can use the SQL SELECT Statement to select and view only certain fields from a table. For example, the below SQL SELECT Statement query will return “employee_id”, “employee_name” and “department” fields only from the e...
Finally, you can use subqueries in your SELECT statement. This is a more advanced feature and you probably won’t need to use it unless you’re writing a more complicated query. Adding a subquery in the SELECT clause means that the result of the subquery is shown as a column value. One...
SELECT UPPER(FirstName) + ' ' + UPPER(LastName) AS FullName FROM Person.Person This statement may look complicated, but once we break it down, you’ll see it’s just made up of a bunch of simple elements. As you just learned, UPPER is used to return the upper case of a column....
ALTER VIEW 语句的语法为: ALTER VIEW view_name AS select_statement; 请注意,ALTER 语句的确切语法可能因所使用的特定数据库管理系统 (DBMS) 而异。 SQL 十三招,今天简单介绍到这里!关注、点赞、转发,是我持续创作有价值知乎文的动力,谢谢啦!!
The SQL SELECT statement is used to select data from a database table and the selected data is returned in the form of a table. Syntax The syntax for using SELECT statement in different scenarios are given below: /*select one column*/ SELECT column1 FROM table_name; /*select multiple ...
You can create new column names using the AS clause.SQL SELECT INTO ExamplesThe following SQL statement creates a backup copy of Customers:SELECT * INTO CustomersBackup2017 FROM Customers; The following SQL statement uses the IN clause to copy the table into a new table in another database:...
-- select first_name from Customers tableSELECTfirst_nameFROMCustomers; Run Code The above SQL query selects thefirst_nameof all the customers from theCustomerstable. SQL SELECT Syntax The syntax of the SQLSELECTstatement is: SELECTcolumn1, column2, ...FROMtable; ...