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1 cze 2021 · To get the number of seconds in a week: SELECT 60 * 60 * 24 * 7; -- result: 604800. From time to time, you need to change the type of a number. The CAST() function is there to help you out. It lets you change the type of value to almost anything (integer, numeric, double precision, varchar, and many more).
1 cze 2021 · Check the documentation for your specific database. LIKE OPERATOR – PATTERN MATCHING Use the _ character to replace any single character. Use the % character to replace any number of characters (including 0 characters). Fetch all names that start with any letter followed by 'atherine': SELECT name FROM names WHERE name LIKE '_atherine';
Our SQL tutorial will teach you how to use SQL in: MySQL, SQL Server, MS Access, Oracle, Sybase, Informix, Postgres, and other database systems. Start learning SQL now » Examples in Each Chapter
• Oracle Database PL/SQL Language Reference for information on PL/SQL, the procedural language extension to Oracle SQL • Pro*C/C++ Programmer's Guide and Pro*COBOL Programmer's Guide for detailed
In this document, we will use the Microsoft SQL Server as an example. In this Tutorial, we will focus on Microsoft SQL Server. SQL Server uses T-SQL (Transact-SQL). T-SQL is Microsoft's proprietary extension to SQL. T-SQL is very similar to standard SQL, but in addition it supports some extra functionality, built-in functions, etc.
6 paź 2009 · Section 1.1 Basics of the SELECT Statement. In a relational database, data is stored in tables. An example table would relate Social Security Number, Name, and Address: EmployeeAddressTable SSN FirstName LastName Address City State.
VALUES returns a table, after evaluating all expressions: VALUES ( expression [, ...] ) [, ...] TABLE table_name [ ORDER BY expression [ ASC | DESC | USING op ], ... ] [ LIMIT num ] [ OFFSET num ] SELECT ... FROM tab1 [ INNER ] JOIN tab2 ON condition; SELECT ... FROM tab1 [ INNER ] JOIN tab2 USING (column list); SELECT ...
