Difference between different types of SQL? - Stack Overflow
Aug 25, 2009 · SQL is Structured Query Language is a database computer language designed for managing data in relational database management systems (RDBMS). PostgreSQL is an object …
sql - What are DDL and DML? - Stack Overflow
Apr 5, 2010 · I have heard the terms DDL and DML in reference to databases, but I don't understand what they are. What are they and how do they relate to SQL?
Besides a declarative language, is SQL a functional language?
Jul 20, 2009 · SQL was designed as a declarative language, in sense that you tell what you want to get and the SQL engine decides how. However, SQL operates on sets, and the results of the functions …
What collation to use for SQL Server database? - Stack Overflow
8 You can set the collation explicitly for each column using the COLLATE clause, if your data model allows you to separate data into language-specific columns. You can also apply the COLLATE …
SQL Server data types to store strings and take less space
Feb 13, 2018 · 1 I have a question in regards to data types that are available in SQL language to store data into the database itself.
When must we use NVARCHAR/NCHAR instead of VARCHAR/CHAR in …
Mar 5, 2009 · 84 Is there a rule when we must use the Unicode types? I have seen that most of the European languages (German, Italian, English, ...) are fine in the same database in VARCHAR …
What's the SQL national character (NCHAR) datatype really for?
Dec 13, 2011 · In my opinion, about the only place where the older CHAR/VARCHAR types are still preferred is for frequently-referenced ascii-only internal codes and data on platforms like Sql Server …
Why should I capitalize my SQL keywords? Is there a good reason?
Possible Duplicate: Is there a good reason to use upper case for T-SQL keywords? I personally find a string of lowercase characters to be more readable than a string of uppercase characters. Is s...
indexing - What is an index in SQL? - Stack Overflow
Jun 2, 2010 · An index is used to speed up the performance of queries. It does this by reducing the number of database data pages that have to be visited/scanned. In SQL Server, a clustered index …
What is the purpose of ASSEMBLIES in SQL Server?
By referencing this module, common language runtime (CLR) functions, stored procedures, triggers, user-defined aggregates, and user-defined types can be created in the database. CREATE …