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A database as the name may suggest in the simplest form is a container storing data that people (or devices) can interact with. This container usually stores data in a structured way and it does it by creating objects (entities/tables) that represent real life objects, processes or events for instance Customer, Invoice or Meeting. Objects have properties (attributes/fields/columns) that describe it. For instance Customer object (in our customer customer is a company not an invidividual person) can be described by its Company Name, address line1, address line2, county, post code, country, main contact, Importance (eg important customer), and so on. Once we have the structure (object + properties) we can store data in it. Check this one for what is a database?
Microsoft SQL Server is typically the database of choice in Windows environments appealing to database administrators who appreciate the affordability and power of SQL Server and are familiar with the distinctive Microsoft “look and feel”. SQL Server databases today drive many mid-ranges to high-end enterprise applications which cannot afford any performance and scalability limitations. Check out latest sql tutorial for beginners.
A database stores data in table (fields and rows). You can communicate with database using SQL and in order to retrieve data (rows) from one or more tables and one or more fields you can use sql select statement. A common requirement when working with data, irrespective of its source is to be able to add additional columns to the result set ´on the fly‘. This is pretty straightforward if you simply want a new, sql add column, just define it directly in the query using the space () function.
The SQL GROUP BY statement is used along with the SQL aggregate functions like SUM to provide means of grouping the result dataset by certain database table column(s).
When connecting to Microsoft SQL Server and trying to use usually SQL Authentication method you may get event ID error 18456 login failed for user you provided. his usually means that your connection request was successfully received by the server name you specified but the server is not able to grant you access for a number of reasons and throws sql server error 18456.
SSIS Package stands for SQL Server Integration Services and is part of Microsoft SQL Server Business Intelligence (BI) Stack. It is included in version 2005, 2008 and 2008 R2 (and soon Denali SQL 2011?). Previous version of SSIS Package was called DTS and was included in SQL Server 2000.
The ALTER TABLE ADD COLUMN command modifies the definition of an existing table and adds new columns. Only the table owner, a DBA, or a user with the ALTER privilege for that table may execute the command. To specify a column definition, provide a column name and a data type or domain. Optionally add multiple columns in a single alter table modify column command, provided the total number of columns in the table after executing the command does not exceed the maximum number of columns permitted in a table.
SQL Update is used to update one table columns with specified values. You can update one or multiple columns at the same time. For instance you might want to update customer address and this case you would update several columns like AddressLine1, AddressLine2, City, Post code with usually either hard coded or provided values from end user application. SQL Update the most common task is to specify correct filter (or join) so we update only the rows with values we want to affect.
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