( July 2010 ) (Learn how and when to remove this message ) Database Management Library (DBL) Developer(s) Rodrigo C. O. Rocha Initial release July 2, 2010 Stable release 1.0 / July 2, 2010...
배울 내용 ; What is the difference between Data and Information? ; What is the meaning of database? ; What are some common types of databases? ; Whether a Company sticks to one type of database?
Data column name, Data type, Description ; ApplicationName, nvarchar, Name of the client application that created the connection to an instance of Microsoft SQL Server. This column is populated with the values passed by the application rather than the displayed name of the program. ; DatabaseID, int, ID of the database specified by the USE database statement or the default database if no USE database statement has been issued for a given instance. SQL Server Profiler displays the name of the database if the ServerName data column is captured in the trace and the server is available. Determine the value for a database by using the DB_ID function. ; DatabaseName, nvarchar, Name of the database in which the user statement is running. ; DBUserName, nvarchar, SQL Server user name of the client. ; EventSequence, int, Sequence of a given event within the request. ; EventSubClass, int, Type of event subclass. 1=Create 2=Alter 3=Drop 4=Dump 10=Open 11=Load 12=Access ; HostName, nvarchar, Name of the computer on which the client is running. This data column is populated if the client provides the host name. To determine the host name, use the HOST_NAME function. ; IsSystem, int, Indicates whether the event occurred on a system process or a user process. 1 = system, 0 = user. ; LoginName, nvarchar, Name of the login of the user (either the SQL Server security login or the Microsoft Windows login credentials in the form of DOMAIN\username). ; LoginSid, image, Security identification number (SID) of the logged-in user. You can find this information in the sys.server_principals catalog view. Each SID is unique for each login in the server. ; NTDomainName, nvarchar, Windows domain to which the user belongs. ; NTUserName, nvarchar, Windows user name. ; ObjectName, nvarchar, Name of the object being referenced. ; ObjectType, int, Value representing the type of the object involved in the event. This value corresponds to the type column in the sys.objects catalog view. For values, see ObjectType Trace Event Column . ; OwnerName, nvarchar, Database user name of the object owner. ; RequestID, int, ID of the request containing the statement. ; ServerName, nvarchar, Name of the instance of SQL Server being traced. ; SessionLoginName, nvarchar, Login name of the user who originated the session. For example, if you connect to SQL Server using Login1 and execute a statement as Login2, SessionLoginName shows Login1 and LoginName shows Login2. This column displays both SQL Server and Windows logins. ; SPID, int, ID of the session on which the event occurred. ; StartTime, datetime, Time at which the event started, if available. ; Success, int, 1 = success. 0 = failure. For example, a value of 1 indicates success of a permissions check and a value of 0 indicates failure of that check. ; TextData, ntext, Text value dependent on the event class captured in the trace. ; TransactionID, bigint, System-assigned ID of the transaction. ; XactSequence, bigint, Token used to describe the current transaction.
배울 내용 ; What is meant by ACID properties in DBMS? ; What are the various components of DBMS? ; Which are the key concepts or components of the Relational Model? ; What is meant by Primary Key, Foreign Key and Composite Key?
Data column name, Data type, Description ; ApplicationName, nvarchar, Name of the client application that created the connection to an instance of Microsoft SQL Server. This column is populated with the values passed by the application rather than the displayed name of the program. ; DatabaseID, int, ID of the database specified by the USE database statement or the default database if no USE database statement has been issued for a given instance. SQL Server Profiler displays the name of the database if the Server Name data column is captured in the trace and the server is available. Determine the value for a database by using the DB_ID function. ; DatabaseName, nvarchar, Name of the database in which the user statement is running. ; DBUserName, nvarchar, SQL Server user name of the client. ; EventSequence, int, Sequence of a given event within the request. ; EventSubClass, int, Type of event subclass. 1=Create 2=Alter 3=Drop 4=Dump 11=Load ; HostName, nvarchar, Name of the computer on which the client is running. This data column is populated if the client provides the host name. To determine the host name, use the HOST_NAME function. ; IsSystem, int, Indicates whether the event occurred on a system process or a user process. 1 = system, 0 = user. ; LoginName, nvarchar, Name of the login of the user (either the SQL Server security login or the Microsoft Windows login credentials in the form of DOMAIN\username). ; LoginSid, image, Security identification number (SID) of the logged-in user. You can find this information in the sys.server_principals catalog view. Each SID is unique for each login in the server. ; NTDomainName, nvarchar, Windows domain to which the user belongs. ; NTUserName, nvarchar, Windows user name. ; ObjectName, nvarchar, Name of the object being referenced. ; ObjectType, int, Value representing the type of the object involved in the event. This value corresponds to the type column in the sysobjects table. For values, see ObjectType Trace Event Column . ; OwnerName, nvarchar, Database user name of the object owner. ; RequestID, int, ID of the request containing the statement. ; ServerName, nvarchar, Name of the instance of SQL Server being traced. ; SessionLoginName, nvarchar, Login name of the user who originated the session. For example, if you connect to SQL Server using Login1 and execute a statement as Login2, SessionLoginName shows Login1 and LoginName shows Login2. This column displays both SQL Server and Windows logins. ; SPID, int, ID of the session on which the event occurred. ; StartTime, datetime, Time at which the event started, if available. ; Success, int, 1 = success. 0 = failure. For example, a value of 1 means success of a permissions check and a value of 0 means a failure of that check. ; TextData, ntext, Text value dependent on the event class captured in the trace. ; TransactionID, bigint, System-assigned ID of the transaction. ; XactSequence, bigint, Token used to describe the current transaction.
Database Management System Excellence: Module 5 Taking Your Database Skills to the Next Level... 4.3 (평가 46명) 9,707명의 수강생 생성자 Prabh Kirpa Classes 마지막 업데이트: 10...
Data column name, Data type, Description ; ApplicationName, nvarchar, Name of the client application that created the connection to an instance of Microsoft SQL Server. This column is populated with the values passed by the application rather than the displayed name of the program. ; DatabaseID, int, ID of the database specified by the USE database statement or the default database if no USE database statement has been issued for a given instance. SQL Server Profiler displays the name of the database if the ServerName data column is captured in the trace and the server is available. Determine the value for a database by using the DB_ID function. ; DatabaseName, nvarchar, Name of the database in which the user statement is running. ; DBUserName, nvarchar, SQL Server user name of the client. ; EventSequence, int, Sequence of a given event within the request. ; EventSubClass, int, Type of event subclass. 1=Create 2=Alter 3=Drop 4=Dump 11=Load ; HostName, nvarchar, Name of the computer on which the client is running. This data column is populated if the client provides the host name. To determine the host name, use the HOST_NAME function. ; IsSystem, int, Indicates whether the event occurred on a system process or a user process. 1 = system, 0 = user. ; LoginName, nvarchar, Name of the login of the user (either the SQL Server security login or the Microsoft Windows login credentials in the form of DOMAIN\username). ; LoginSid, image, Security identification number (SID) of the logged-in user. You can find this information in the sys.server_principals catalog view. Each SID is unique for each login in the server. ; NTDomainName, nvarchar, Windows domain to which the user belongs. ; NTUserName, nvarchar, Windows user name. ; ObjectName, nvarchar, Name of the object being referenced. ; ObjectType, int, Value representing the type of the object involved in the event. This value corresponds to the type column in the sys.objects catalog view. For values, see ObjectType Trace Event Column . ; OwnerName, nvarchar, Database user name of the object owner. ; RequestID, int, ID of the request containing the statement. ; ServerName, nvarchar, Name of the instance of SQL Server being traced. ; SessionLoginName, Nvarchar, Login name of the user who originated the session. For example, if you connect to SQL Server using Login1 and execute a statement as Login2, SessionLoginName shows Login1 and LoginName shows Login2. This column displays both SQL Server and Windows logins. ; SPID, int, ID of the session on which the event occurred. ; StartTime, datetime, Time at which the event started, if available. ; Success, int, 1 = success. 0 = failure. For example, a value of 1 indicates success of a permissions check and a value of 0 indicates failure of that check. ; TransactionID, bigint, System-assigned ID of the transaction. ; XactSequence, bigint, Token used to describe the current transaction.
The query engine creates one connection and adds it to the connection pool. When a query comes in, the query engine reserves a connection from the pool to process query. If there are no idle connections available in the connection pool, the query engine opens additional database connections and adds them to the connection pool until the number of database connections reaches the limit defined by connection_limit. If the query engine cannot reserve a connection from the pool, queries are added to a FIFO (First In First Out) queue in memory. FIFO ...
GRASS database management · PyGRASS implements the classes described bellow: Gisdbase · Location · Mapset · VisibleMapset · These classes are used to manage the infrastructure of GRASS database: GIS data directory, Location and Mapset. Details about the GRASS GIS database management (locations and mapsets) can be found in the GRASS GIS 7 User’s Manual: GRASS GIS Quickstart. Region management · The Region class it is useful to obtain information about the computational region and to...
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