Overview of Database Management Systems
... (WAL protocol; OS support for this is often inadequate.) After a crash, the effects of partially executed transactions are undone using the log. (Thanks to WAL, if log entry wasn’t saved before the crash, corresponding change was not applied to database!) ...
... (WAL protocol; OS support for this is often inadequate.) After a crash, the effects of partially executed transactions are undone using the log. (Thanks to WAL, if log entry wasn’t saved before the crash, corresponding change was not applied to database!) ...
Row-Level Security
... • RLS works transparently at query time, no app changes needed • Compatible with RLS in other leading products Centralized Security Logic • Enforcement logic resides inside database and is schema-bound to the table it protects providing greater security. Reduced application maintenance and complexit ...
... • RLS works transparently at query time, no app changes needed • Compatible with RLS in other leading products Centralized Security Logic • Enforcement logic resides inside database and is schema-bound to the table it protects providing greater security. Reduced application maintenance and complexit ...
Ch1_Intro-95.old
... (Strict 2PL locking protocol.) Idea: If an action of Ti (say, writing X) affects Tj (which perhaps reads X), one of them, say Ti, will obtain the lock on X first and Tj is forced to wait until Ti completes; this effectively orders the transactions. What if Tj already has a lock on Y and Ti later req ...
... (Strict 2PL locking protocol.) Idea: If an action of Ti (say, writing X) affects Tj (which perhaps reads X), one of them, say Ti, will obtain the lock on X first and Tj is forced to wait until Ti completes; this effectively orders the transactions. What if Tj already has a lock on Y and Ti later req ...
DATABASE MANAGEMENT SYSTEMS
... or generated by the program itself, but unlike static SQL statements, they are not embedded in the source program. Also in contrast to static SQL statements, dynamic SQL statements can change from one execution to the next. 22. Define cursors A mechanism for retrieving rows from the database one at ...
... or generated by the program itself, but unlike static SQL statements, they are not embedded in the source program. Also in contrast to static SQL statements, dynamic SQL statements can change from one execution to the next. 22. Define cursors A mechanism for retrieving rows from the database one at ...
Py4Inf-14-Database-FireFox
... overall amount of data which the relational database must scan is far lower than if the data were simply flattened out. It might seem like a tradeoff - spend some time designing your database so it continues to be fast when your application is a success ...
... overall amount of data which the relational database must scan is far lower than if the data were simply flattened out. It might seem like a tradeoff - spend some time designing your database so it continues to be fast when your application is a success ...
Databases and Web-programming RW 334 Database Systems
... Types of Databases • Many dimensions – Such as single user, multiple user, centralized or distributed, etc. • From a DB design point we will consider multiple user and centralized ...
... Types of Databases • Many dimensions – Such as single user, multiple user, centralized or distributed, etc. • From a DB design point we will consider multiple user and centralized ...
Chapter 2
... having to change external schemas or application programs. Physical data independence is the capacity to change the internal schema without having to change the conceptual schema. 2.3 Database Languages and Interfaces - The DBMS must provide appropriate languages and interfaces for each category o ...
... having to change external schemas or application programs. Physical data independence is the capacity to change the internal schema without having to change the conceptual schema. 2.3 Database Languages and Interfaces - The DBMS must provide appropriate languages and interfaces for each category o ...
Applying Database Replication to Multi
... • Modeling based on transactions • E.g., two players might type same string concurrently. – Model: Typing a string as one transaction, while typing a character as an operation ...
... • Modeling based on transactions • E.g., two players might type same string concurrently. – Model: Typing a string as one transaction, while typing a character as an operation ...
Jerry Held
... Customizable configuration parameters simplify RMAN operations. Default settings are set once and used for subsequent jobs. A DBA can invoke RMAN and back up a database with one command: BACKUP DATABASE. Oracle9i provides the new CONFIGURE command to override default settings persistently. ...
... Customizable configuration parameters simplify RMAN operations. Default settings are set once and used for subsequent jobs. A DBA can invoke RMAN and back up a database with one command: BACKUP DATABASE. Oracle9i provides the new CONFIGURE command to override default settings persistently. ...
SQLSaturday_Slide_Deck_Rohan
... Why we need to backup databases? • Database architecture helps to keep track of changes. • Everything in life can fail • Disaster can happen at anytime • Backup helps to move the database • Using backups we initiate other SQL Server disaster recovery features such as the log shipping, replication a ...
... Why we need to backup databases? • Database architecture helps to keep track of changes. • Everything in life can fail • Disaster can happen at anytime • Backup helps to move the database • Using backups we initiate other SQL Server disaster recovery features such as the log shipping, replication a ...
Lecture-24-30 (sections 9.1-9.7)
... Click on the down arrow again and observe that now you can see all objects that can be created in Access: Forms, Tables, Queries, Reports, Macros, etc … Select “Tables” and double click on the only table in the menu (usually called Table1) In the upper menu (right above “Table1”): Click on View and ...
... Click on the down arrow again and observe that now you can see all objects that can be created in Access: Forms, Tables, Queries, Reports, Macros, etc … Select “Tables” and double click on the only table in the menu (usually called Table1) In the upper menu (right above “Table1”): Click on View and ...
chapter19
... system should ensure that its updates are not reflected in the database, else inconsistency will result. Duribility : once the user has been notified that the transaction has been completed, the updates to the database by the transaction must persist despite failures. Isolation : if between steps 3 ...
... system should ensure that its updates are not reflected in the database, else inconsistency will result. Duribility : once the user has been notified that the transaction has been completed, the updates to the database by the transaction must persist despite failures. Isolation : if between steps 3 ...
Information Encoding in Biological Molecules: DNA and
... Take the standard deviation of the expression values for each gene in the cluster Use the keys to iterate through the geneExpressionMap HashMap Sum(x_i-u_i)^2/(N-1) ...
... Take the standard deviation of the expression values for each gene in the cluster Use the keys to iterate through the geneExpressionMap HashMap Sum(x_i-u_i)^2/(N-1) ...
Database Security (cont.)
... – user-level security, which can be used to limit the parts of the database that a user can read or update (data security). ...
... – user-level security, which can be used to limit the parts of the database that a user can read or update (data security). ...
multi-dimensional views of data
... • A series of numbers representing a particular variable over time is called a time series e.g.. 52 weekly sales numbers is a time series. • Utilising a time-series data type allows you to store an entire string of numbers representing daily, weekly or monthly data. • Thus an OLAP server that suppor ...
... • A series of numbers representing a particular variable over time is called a time series e.g.. 52 weekly sales numbers is a time series. • Utilising a time-series data type allows you to store an entire string of numbers representing daily, weekly or monthly data. • Thus an OLAP server that suppor ...
sql server 2005
... Base tables referenced by the view must be in the same database as the view and must have the same owner Create the view and any user-defined functions referenced in the view with the SCHEMABINDING option. This means that the underlying tables or other database objects cannot be altered or dropped a ...
... Base tables referenced by the view must be in the same database as the view and must have the same owner Create the view and any user-defined functions referenced in the view with the SCHEMABINDING option. This means that the underlying tables or other database objects cannot be altered or dropped a ...
here - University of Utah School of Computing
... · Studied exact and approximate algorithms for flexible aggregate similarity search queries in low and high dimensional spatial databases. · Implemented and optimized approximate algorithms for FANN queries. · Practical Private Shortest Path Computation based on Oblivious Storage · Studied shortest ...
... · Studied exact and approximate algorithms for flexible aggregate similarity search queries in low and high dimensional spatial databases. · Implemented and optimized approximate algorithms for FANN queries. · Practical Private Shortest Path Computation based on Oblivious Storage · Studied shortest ...
Introduction to Database Systems
... XQuery from the Experts, Katz, Ed. Fundamentals of Database Systems, Elmasri, Navathe Foundations of Databases, Abiteboul, Hull, Vianu Data on the Web, Abiteboul, Buneman, Suciu ...
... XQuery from the Experts, Katz, Ed. Fundamentals of Database Systems, Elmasri, Navathe Foundations of Databases, Abiteboul, Hull, Vianu Data on the Web, Abiteboul, Buneman, Suciu ...
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Query Optimization – Seminar 1
... Consider a relation R(a, b, c, d, e) containing 5,000,000 records (tuples), where each data page of the relation holds 10 records. R is organized as a sorted file with dense secondary indexes. Assume that R.a is a candidate key for R, with values lying in the range of 0 to 4,999,999, and that R is s ...
... Consider a relation R(a, b, c, d, e) containing 5,000,000 records (tuples), where each data page of the relation holds 10 records. R is organized as a sorted file with dense secondary indexes. Assume that R.a is a candidate key for R, with values lying in the range of 0 to 4,999,999, and that R is s ...
Query Optimization – Seminar 1
... Consider a relation R(a, b, c, d, e) containing 5,000,000 records (tuples), where each data page of the relation holds 10 records. R is organized as a sorted file with dense secondary indexes. Assume that R.a is a candidate key for R, with values lying in the range of 0 to 4,999,999, and that R is s ...
... Consider a relation R(a, b, c, d, e) containing 5,000,000 records (tuples), where each data page of the relation holds 10 records. R is organized as a sorted file with dense secondary indexes. Assume that R.a is a candidate key for R, with values lying in the range of 0 to 4,999,999, and that R is s ...
04CM20145Lecture9 - Department of Computer Science
... read/written magnetically. Primary medium for the long-term storage of data; typically stores entire database. Data must be moved from disk to main memory for access, and written back for storage. Much slower access than main memory, but ...
... read/written magnetically. Primary medium for the long-term storage of data; typically stores entire database. Data must be moved from disk to main memory for access, and written back for storage. Much slower access than main memory, but ...