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• Which command using Query Analyzer will give you the version of SQL server and operating

  Sat, 10 May 2008 09:26:00 +0000
  Which command using Query Analyzer will give you the version of SQL server and operating
  system?
  
  Ans:
  
  SELECT SERVERPROPERTY('productversion'), SERVERPROPERTY ('productlevel'), SERVERPROPERTY
  ('edition')
  noreply@blogger.com (Educational Information)

• What is SQL server agent?

  Sat, 10 May 2008 09:26:00 +0000
  SQL Server agent plays an important role in the day-to-day tasks of a database administrator (DBA). It
  is often overlooked as one of the main tools for SQL Server management. Its purpose is to ease the
  implementation of tasks for the DBA, with its full-function scheduling engine, which allows you to
  schedule your own jobs and scripts.
  noreply@blogger.com (Educational Information)

• Can a stored procedure call itself or recursive stored procedure? How many level SP nesting

  Sat, 10 May 2008 09:26:00 +0000
  Can a stored procedure call itself or recursive stored procedure? How many level SP nesting
  possible?
  
  Ans:
  
  Yes. Because Transact-SQL supports recursion, you can write stored procedures that call themselves.
  Recursion can be defined as a method of problem solving wherein the solution is arrived at by
  repetitively applying it to subsets of the problem. A common application of recursive logic is to perform
  numeric computations that lend themselves to repetitive evaluation by the same processing steps.
  Stored procedures are nested when one stored procedure calls another or executes managed code by
  referencing a CLR routine, type, or aggregate. You can nest stored procedures and managed code
  references up to 32 levels.
  noreply@blogger.com (Educational Information)

• What is @@ERROR?

  Sat, 10 May 2008 09:25:00 +0000
  The @@ERROR automatic variable returns the error code of the last Transact-SQL statement. If there
  was no error, @@ERROR returns zero. Because @@ERROR is reset after each Transact-SQL statement,
  it must be saved to a variable if it is needed to process it further after checking it.
  noreply@blogger.com (Educational Information)

• What is Raiseerror?

  Sat, 10 May 2008 09:25:00 +0000
  Stored procedures report errors to client applications via the RAISERROR command. RAISERROR
  doesn't change the flow of a procedure; it merely displays an error message, sets the @@ERROR
  automatic variable, and optionally writes the message to the SQL Server error log and the NT
  application event log.
  noreply@blogger.com (Educational Information)

• What is log shipping?

  Sat, 10 May 2008 09:25:00 +0000
  Log shipping is the process of automating the backup of database and transaction log files on a
  production SQL server, and then restoring them onto a standby server. Enterprise Editions only
  supports log shipping. In log shipping the transactional log file from one server is automatically updated
  into the backup database on the other server. If one server fails, the other server will have the same db
  can be used this as the Disaster Recovery plan. The key feature of log shipping is that is will
  automatically backup transaction logs throughout the day and automatically restore them on the
  standby server at defined interval.
  noreply@blogger.com (Educational Information)

• What is the difference between a local and a global variable?

  Sat, 10 May 2008 09:24:00 +0000
  A local temporary table exists only for the duration of a connection or, if defined inside a compound
  statement, for the duration of the compound statement.
  A global temporary table remains in the database permanently, but the rows exist only within a given
  connection. When connection are closed, the data in the global temporary table disappears. However,
  the table definition remains with the database for access when database is opened next time.
  noreply@blogger.com (Educational Information)

• What command do we use to rename a db?

  Sat, 10 May 2008 09:24:00 +0000
  sp_renamedb ‘oldname’ , ‘newname’
  If someone is using db it will not accept sp_renmaedb. In that case first bring db to single user using
  sp_dboptions. Use sp_renamedb to rename database. Use sp_dboptions to bring database to multi user
  mode.
  noreply@blogger.com (Educational Information)

• What is sp_configure commands and set commands?

  Sat, 10 May 2008 09:24:00 +0000
  Use sp_configure to display or change server-level settings. To change database-level settings, use
  ALTER DATABASE. To change settings that affect only the current user session, use the SET statement.
  noreply@blogger.com (Educational Information)

• What are the different types of replication? Explain.

  Sat, 10 May 2008 09:23:00 +0000
  The SQL Server 2000-supported replication types are as follows:
  · Transactional
  · Snapshot
  · Merge
  Snapshot replication distributes data exactly as it appears at a specific moment in time and does not
  monitor for updates to the data. Snapshot replication is best used as a method for replicating data that
  changes infrequently or where the most up-to-date values (low latency) are not a requirement. When
  synchronization occurs, the entire snapshot is generated and sent to Subscribers.
  Transactional replication, an initial snapshot of data is applied at Subscribers, and then when data
  modifications are made at the Publisher, the individual transactions are captured and propagated to
  Subscribers.
  Merge replication is the process of distributing data from Publisher to Subscribers, allowing the
  Publisher and Subscribers to make updates while connected or disconnected, and then merging the
  updates between sites when they are connected.
  noreply@blogger.com (Educational Information)

• What are the OS services that the SQL Server installation adds?

  Sat, 10 May 2008 09:23:00 +0000
  MS SQL SERVER SERVICE, SQL AGENT SERVICE, DTC (Distribution transac co-ordinator)
  noreply@blogger.com (Educational Information)

• What are three SQL keywords used to change or set someone’s permissions?

  Sat, 10 May 2008 09:22:00 +0000
  GRANT, DENY, and REVOKE.
  noreply@blogger.com (Educational Information)

• What does it mean to have quoted_identifier on? What are the implications of having it off?

  Sat, 10 May 2008 09:22:00 +0000
  When SET QUOTED_IDENTIFIER is ON, identifiers can be delimited by double quotation marks, and
  literals must be delimited by single quotation marks. When SET QUOTED_IDENTIFIER is OFF, identifiers
  cannot be quoted and must follow all Transact-SQL rules for identifiers.
  noreply@blogger.com (Educational Information)

• What is the STUFF function and how does it differ from the REPLACE function?

  Sat, 10 May 2008 09:21:00 +0000
  STUFF function to overwrite existing characters. Using this syntax, STUFF(string_expression, start,
  length, replacement_characters), string_expression is the string that will have characters substituted,
  start is the starting position, length is the number of characters in the string that are substituted, and
  replacement_characters are the new characters interjected into the string.
  REPLACE function to replace existing characters of all occurance. Using this syntax
  REPLACE(string_expression, search_string, replacement_string), where every incidence of
  search_string found in the string_expression will be replaced with replacement_string.
  noreply@blogger.com (Educational Information)

• Using query analyzer, name 3 ways to get an accurate count of the number of records in a

  Sat, 10 May 2008 09:21:00 +0000
  Using query analyzer, name 3 ways to get an accurate count of the number of records in a
  table?
  
  ANS:
  
  SELECT * FROM table1
  SELECT COUNT(*) FROM table1
  SELECT rows FROM sysindexes WHERE id = OBJECT_ID(table1) AND indid < 2
  noreply@blogger.com (Educational Information)

• How to rebuild Master Database?

  Sat, 10 May 2008 09:21:00 +0000
  Shutdown Microsoft SQL Server 2000, and then run Rebuildm.exe. This is located in the Program
  Files\Microsoft SQL Server\80\Tools\Binn directory.
  In the Rebuild Master dialog box, click Browse.
  In the Browse for Folder dialog box, select the \Data folder on the SQL Server 2000 compact disc or in
  the shared network directory from which SQL Server 2000 was installed, and then click OK.
  Click Settings. In the Collation Settings dialog box, verify or change settings used for the master
  database and all other databases.
  Initially, the default collation settings are shown, but these may not match the collation selected during
  setup. You can select the same settings used during setup or select new collation settings. When done,
  click OK.
  In the Rebuild Master dialog box, click Rebuild to start the process.
  The Rebuild Master utility reinstalls the master database.
  To continue, you may need to stop a server that is running.
  Source: http://msdn2.microsoft.com/en-us/library/aa197950(SQL.80).aspx
  noreply@blogger.com (Educational Information)

• What is the basic functions for master, msdb, model, tempdb databases?

  Sat, 10 May 2008 09:20:00 +0000
  The Master database holds information for all databases located on the SQL Server instance and is the
  glue that holds the engine together. Because SQL Server cannot start without a functioning master
  database, you must administer this database with care.
  The msdb database stores information regarding database backups, SQL Agent information, DTS
  packages, SQL Server jobs, and some replication information such as for log shipping.
  The tempdb holds temporary objects such as global and local temporary tables and stored procedures.
  The model is essentially a template database used in the creation of any new user database created in
  the instance.
  noreply@blogger.com (Educational Information)

• What are primary keys and foreign keys?

  Sat, 10 May 2008 09:20:00 +0000
  Primary keys are the unique identifiers for each row. They must contain unique values and cannot be
  null. Due to their importance in relational databases, Primary keys are the most fundamental of all keys
  and constraints. A table can have only one Primary key.
  Foreign keys are both a method of ensuring data integrity and a manifestation of the relationship
  between tables.
  noreply@blogger.com (Educational Information)

• What is data integrity? Explain constraints?

  Sat, 10 May 2008 09:19:00 +0000
  Data integrity is an important feature in SQL Server. When used properly, it ensures that data is
  accurate, correct, and valid. It also acts as a trap for otherwise undetectable bugs within applications.
  A PRIMARY KEY constraint is a unique identifier for a row within a database table. Every table should
  have a primary key constraint to uniquely identify each row and only one primary key constraint can be
  created for each table. The primary key constraints are used to enforce entity integrity.
  A UNIQUE constraint enforces the uniqueness of the values in a set of columns, so no duplicate values
  are entered. The unique key constraints are used to enforce entity integrity as the primary key
  constraints.
  A FOREIGN KEY constraint prevents any actions that would destroy links between tables with the
  corresponding data values. A foreign key in one table points to a primary key in another table. Foreign
  keys prevent actions that would leave rows with foreign key values when there are no primary keys
  with that value. The foreign key constraints are used to enforce referential integrity.
  A CHECK constraint is used to limit the values that can be placed in a column. The check constraints
  are used to enforce domain integrity.
  A NOT NULL constraint enforces that the column will not accept null values. The not null constraints
  are used to enforce domain integrity, as the check constraints.
  noreply@blogger.com (Educational Information)

• What are the properties of the Relational tables?

  Sat, 10 May 2008 09:18:00 +0000
  Relational tables have six properties:
  · Values are atomic.
  · Column values are of the same kind.
  · Each row is unique.
  · The sequence of columns is insignificant.
  · The sequence of rows is insignificant.
  · Each column must have a unique name.
  noreply@blogger.com (Educational Information)

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