MCITP SQL Server 2005 Database Developer All-in-One Exam Guide in .NET

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MCITP SQL Server 2005 Database Developer All-in-One Exam Guide
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DBA A database administrator (DBA) is typically responsible for administering a database and the database server, as opposed to a database developer, who does much of the development work for a database Administering responsibilities often include recoverability (backups and restores), maintaining integrity, managing security, ensuring availability, and maximizing performance DBCC Database Console Command (DBCC) was previously known as Database Consistency Checker Four categories of DBCC commands include many methods that check on the various elements of a database DBMS A database management system (DBMS) is composed of software necessary to organize, store, and retrieve data in a database Access, SQL Server, Oracle, and DB2 are all database management systems DDL Data Definition Language (DDL) This includes the statements of CREATE, ALTER, and DROP and applies to database objects (not data) such as tables, triggers, functions, stored procedures and more DDL trigger A trigger that fires in response to a DDL statement DDL triggers can only be configured as AFTER triggers, not INSTEAD OF triggers DDL triggers are configured at the database level or server level deadlock A locking condition where two processes both have locks on a resource and are waiting for the other process to release a resource before they can continue For example, Sally could have a lock on the Sales table and be waiting to obtain a lock on the Product table At the same time, Joe has a lock on the Product table and is waiting to obtain a lock on the Sales table As a result, neither process can move forward SQL Server automatically detects deadlocks and picks one of the processes as a deadlock victim and rolls it back DELETE A DML statement used to delete data within a table or VIEW Note that data is deleted, but objects are dropped denormalized Process of optimizing a database by adding redundant data A normalized database typically conforms to first normal form, second normal form, and third normal form, though more normal forms exist By denormalizing a database, performance gains can sometimes be achieved deterministic Typically refers to functions such as deterministic functions A deterministic function always returns the same result when called with the same input values Indexed VIEWs require any functions used within the indexed VIEW to be deterministic As a comparison, see nondeterministic differential backup A backup type that backs up all the changes since the last full backup Since the differential backup only backs up the changes, it can be done much quicker than a full backup A possible backup strategy might include performing a full backup once a week and doing differential backups daily Distributor Used in replication In the Publisher metaphor, a Distributor is the process that transfers data from the Publisher to the Subscriber
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DMF Dynamic management function (DMF) Dynamic management VIEWs and functions are new to SQL Server 2005 They are used to return server state information to monitor the health of a server instance, diagnose problems, and tune performance There are about 12 different categories of both DMVs and DMFs DML Data Manipulation Language (DML) includes the statements SELECT, INSERT, DELETE, and UPDATE and applies to data (not database objects) within tables and VIEWs DML trigger A trigger that fires in response to a DML statement on a table or view DML triggers can be AFTER triggers on a table, or INSTEAD OF triggers on a table or a VIEW DMV Dynamic management VIEWs (DMVs) and functions are new to SQL Server 2005 They are used to return server state information to monitor the health of a server instance, diagnose problems, and tune performance About 12 different categories of both DMVs and DMFs exist DROP A DDL statement used to delete objects within a database, or objects on the server Note that data is deleted, but objects are dropped DTA The Database Engine Tuning Advisor (DTA) is used to analyze the performance effects of T-SQL statements and provide recommendations to add, remove, or modify indexes, indexed VIEWs, and partitioning (physical design structures) DTS Data Transformation Services (DTS) was the ETL tool available in SQL Server 70 and SQL Server 2000 SQL Server Integration Services (SSIS) is the successor to DTS Legacy DTS packages can be migrated into SSIS, or run using the Execute DTS 2000 Package task dynamic SQL A SQL statement built and executed at runtime by concatenating different parts of the statement based on provided variables Generally, dynamic SQL is not recommended, especially in web sites, due to SQL injection attacks The solution is to use parameterized stored procedures that build the SQL statement differently endpoints A new feature in SQL Server 2005 used to manage connections An endpoint is a SQL Server object used by SQL Server to communicate over the network In database mirroring, a SQL Server instance uses a special purpose endpoint to receive database mirroring connections with other server instances The two primary endpoints are HTTP endpoints and database mirroring endpoints ETL This is a Business Intelligence (BI) term representing Extract, Transform, and Load We extract data out of one database or table, transform it to conform to the standards in the destination, and load it into the target database or table SSIS is the primary tool used for ETL in SQL Server 2005 EXCEPT The EXCEPT operator can be used within a SELECT statement It will return any distinct values from a query to the left of the EXCEPT operator that are not also returned from the query to right of the EXCEPT operator
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