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The AS command is used to rename a column or table with an alias. An alias only exists for the duration of the query. Alias for Columns. The following SQL statement creates two aliases, one for the CustomerID column and one for the CustomerName column: Example Get your own SQL Server. SELECT CustomerID AS ID, CustomerName AS Customer.
12 lis 2010 · The AS keyword is to give an ALIAS name to your database table or to table column. In your example, both statement are correct but there are circumstance where AS clause is needed (though the AS operator itself is optional), e.g. SELECT salary * 2 AS "Double salary" FROM employee;
11 lut 2020 · Learn how to use SQL AS keyword to give aliases to table or column names in queries. See syntax, benefits and examples with SQL Fiddle.
6 wrz 2024 · Learn how to use the SELECT AS clause in SQL to temporarily change the names of columns or tables in the result set of a query. See examples of aliasing for columns, tables, aggregate functions, and concatenation with AS.
AS stosuje się w celu użycia innej nazwy kolumny niż wynika to z wyrażenia ją generującego. W efekcie powstają aliasy. Klauzuli tej używa się zwykle przy funkcjach agregacji , gdy powstaje obiekt o powtarzającej się nazwie. Uwaga: AS występuje także w SQL jako słowo kluczowe w instrukcjach: CONNECT, CREATE DOMAIN, CREATE VIEW ! Składnia.
19 lip 2021 · Learn how to use the AS keyword in SQL to create aliases for tables, columns, and functions. See examples of renaming, joining, and querying with AS in different scenarios.
What is the SQL AS Statement? 6 Examples of SQL AS Statement in Queries. 1. Column Aliasing. 2. Table Aliasing. 3. Aliasing Expressions or Calculated Fields. 4. Concatenating Columns. 5. Using Aggregate Functions: 6. Complex Queries and Subqueries. Common Mistakes and Best Practices When Using SQL AS Statement. 1. Forgetting the AS Keyword. 2.
