CS352 Lecture - Commercial Query Languages: SQL, QBE last
... L) This lecture will serve to provide a bit of background, and also to introduce some key features of SQL that you have not seen yet. B. SQL was originally developed for use with IBM's System R - the earliest research implementation of the relational model. In its original form, it was known as SEQU ...
... L) This lecture will serve to provide a bit of background, and also to introduce some key features of SQL that you have not seen yet. B. SQL was originally developed for use with IBM's System R - the earliest research implementation of the relational model. In its original form, it was known as SEQU ...
notes - Course Website Directory
... $sql = "INSERT INTO book(isbn, name) VALUES ($isbn, '$book')"; mysql_query($sql)) ...
... $sql = "INSERT INTO book(isbn, name) VALUES ($isbn, '$book')"; mysql_query($sql)) ...
Click to Unit 4 of DDB
... The three types of failures described above are common to both centralized and distributed DBMSs. Communication failures, however, are unique to the distributed case. There are a number of types of communication failures. The most common ones are the errors in the messages, improperly ordered messag ...
... The three types of failures described above are common to both centralized and distributed DBMSs. Communication failures, however, are unique to the distributed case. There are a number of types of communication failures. The most common ones are the errors in the messages, improperly ordered messag ...
product
... MODIFY (P_PRICE DECIMAL(9,2)); If the column to be changed already contains data, changes in the column’s characteristics are permitted if those changes do not alter the data type ...
... MODIFY (P_PRICE DECIMAL(9,2)); If the column to be changed already contains data, changes in the column’s characteristics are permitted if those changes do not alter the data type ...
Database Systems - University of Texas at Dallas
... what values have been returned from the expression, it just checks for whether a row exists or not. Because of that, if there’s no predicate in the WHERE clause of the subquery that compares rows in the subquery with rows in the outer query, EXISTS will either return true for all the rows in the out ...
... what values have been returned from the expression, it just checks for whether a row exists or not. Because of that, if there’s no predicate in the WHERE clause of the subquery that compares rows in the subquery with rows in the outer query, EXISTS will either return true for all the rows in the out ...
6232B Module 01
... retailer of cycle products. The owners of the company have decided to start a new direct marketing arm of the company. It has been created as a new company named Proseware, Inc. Even though it has been set up as a separate company, it will receive some IT-related services from the existing Adventure ...
... retailer of cycle products. The owners of the company have decided to start a new direct marketing arm of the company. It has been created as a new company named Proseware, Inc. Even though it has been set up as a separate company, it will receive some IT-related services from the existing Adventure ...
6231B_01 - I
... retailer of cycle products. The owners of the company have decided to start a new direct marketing arm of the company. It has been created as a new company named Proseware, Inc. Even though it has been set up as a separate company, it will receive some IT-related services from the existing Adventure ...
... retailer of cycle products. The owners of the company have decided to start a new direct marketing arm of the company. It has been created as a new company named Proseware, Inc. Even though it has been set up as a separate company, it will receive some IT-related services from the existing Adventure ...
Powerpoint - SQL Saturday
... Typical SQL Server has a heterogeneous workload X batches complete in .01s Y in 1s and Z in 100.0 Is it one query over a latency distribution? Or is it 3 very different queries? ...
... Typical SQL Server has a heterogeneous workload X batches complete in .01s Y in 1s and Z in 100.0 Is it one query over a latency distribution? Or is it 3 very different queries? ...
SQL Server Integration Services with Oracle Database 10g
... This paper focuses on the advantages of using SQL Server Integration Services to extract data from heterogeneous sources and import data into Microsoft® SQL Server™ for Business Intelligence (BI) analysis and reporting. Oracle Database 10g data is used as the primary data source. The audience for th ...
... This paper focuses on the advantages of using SQL Server Integration Services to extract data from heterogeneous sources and import data into Microsoft® SQL Server™ for Business Intelligence (BI) analysis and reporting. Oracle Database 10g data is used as the primary data source. The audience for th ...
High Volume Transaction Processing (HVTP) environment and
... overhead. In other words, there were no complicated structures that reached a point of diminishing returns. The application programs themselves were also written very close to the low level TPF architecture. Application programmers were in tight control of database design. Many lower level system se ...
... overhead. In other words, there were no complicated structures that reached a point of diminishing returns. The application programs themselves were also written very close to the low level TPF architecture. Application programmers were in tight control of database design. Many lower level system se ...
Database - UTRGV Faculty Web
... Captures the state of the database at the time the backup started. During the full database backup, the system copies the data as well as the schema of all tables of the database and the corresponding file structures. (all uncommitted transactions in the transaction log are written to the back ...
... Captures the state of the database at the time the backup started. During the full database backup, the system copies the data as well as the schema of all tables of the database and the corresponding file structures. (all uncommitted transactions in the transaction log are written to the back ...
Advanced SQL lecture
... Identified what triggers & procedures are & why they might be used explained the purpose of the SQL GRANT and REVOKE commands ...
... Identified what triggers & procedures are & why they might be used explained the purpose of the SQL GRANT and REVOKE commands ...
Database Procedural Programming PL/SQL and Embedded SQL
... The information is sent only once between database and application and thereafter invoked when it is used. Network traffic is reduced compared with issuing individual SQL statements or sending the text of an entire PL/SQL block A procedure's compiled form is readily available in the database, so ...
... The information is sent only once between database and application and thereafter invoked when it is used. Network traffic is reduced compared with issuing individual SQL statements or sending the text of an entire PL/SQL block A procedure's compiled form is readily available in the database, so ...
Performance
... single set-oriented query Set orientation -> fewer calls to database E.g. tune program that computes total salary for each department using a separate SQL query by instead using a single query that computes total salaries for all department at once (using group by) Use stored procedures: avoid ...
... single set-oriented query Set orientation -> fewer calls to database E.g. tune program that computes total salary for each department using a separate SQL query by instead using a single query that computes total salaries for all department at once (using group by) Use stored procedures: avoid ...
Optimizing SQL
... considerably faster (many times faster in some cases) than using separate single-row INSERT statements. When loading a table from a text file, use COPY FROM. This is usually significantly faster than using INSERT statements. See .http://www.postgresql.org/docs/8.1/static/sql-copy.html While outside ...
... considerably faster (many times faster in some cases) than using separate single-row INSERT statements. When loading a table from a text file, use COPY FROM. This is usually significantly faster than using INSERT statements. See .http://www.postgresql.org/docs/8.1/static/sql-copy.html While outside ...
DBA327
... Connection to DB using standard SQL login and password Use Low privileged login account Use Strong passwords Leverage SSL to protect authentication over the wire ...
... Connection to DB using standard SQL login and password Use Low privileged login account Use Strong passwords Leverage SSL to protect authentication over the wire ...
Object-Oriented Design of Database Stored Procedures
... from lenders must be able to cover the withdrawals of a borrower.) This is another constraint that SPs must check. A Drawdown is a removal of funds within the scope of a Tranche. A Tranche can involve multiple Drawdowns that occur on various dates—the drawDate must lie within the begin and end dates ...
... from lenders must be able to cover the withdrawals of a borrower.) This is another constraint that SPs must check. A Drawdown is a removal of funds within the scope of a Tranche. A Tranche can involve multiple Drawdowns that occur on various dates—the drawDate must lie within the begin and end dates ...
Database System Architectures
... All database processes can access shared memory To ensure that no two processes are accessing the same data structure at the ...
... All database processes can access shared memory To ensure that no two processes are accessing the same data structure at the ...
Using Databases in C2k
... approach as it emulates an approach often used in industry whereby the database server and the application code (C# in this case) are separated, often on different physical servers. Important points to note: ...
... approach as it emulates an approach often used in industry whereby the database server and the application code (C# in this case) are separated, often on different physical servers. Important points to note: ...
Scaling Up with SQL Server 2008
... you can use to collect, analyze, troubleshoot, and store SQL Server diagnostics information. Performance Studio provides an end-to-end solution for performance monitoring that includes low overhead collection, centralized storage, and analytical reporting of performance data. You can use SQL Server ...
... you can use to collect, analyze, troubleshoot, and store SQL Server diagnostics information. Performance Studio provides an end-to-end solution for performance monitoring that includes low overhead collection, centralized storage, and analytical reporting of performance data. You can use SQL Server ...
Using Views and Queries with DB2 and MS ACCESS Databases to Employ Your Business Rules
... users are attempting to get their data directly from the organization database. Data often requires some knowledge of the organization's "rules" for summanzmg and presenting information. These rules may not be readily available to or known by all staff. One way to set up and mange these rules is to ...
... users are attempting to get their data directly from the organization database. Data often requires some knowledge of the organization's "rules" for summanzmg and presenting information. These rules may not be readily available to or known by all staff. One way to set up and mange these rules is to ...
OLTP Through the Looking Glass, and What We Found There
... All modern databases include extensive support for multi-threading, including a collection of transactional concurrency control protocols as well as extensive infiltration of their code with latching commands to support multiple threads accessing shared structures like buffer pools and index pages. ...
... All modern databases include extensive support for multi-threading, including a collection of transactional concurrency control protocols as well as extensive infiltration of their code with latching commands to support multiple threads accessing shared structures like buffer pools and index pages. ...
Declarative Management of SQL Servers and Databases with Policies
... Many organizations require high availability solutions that protect the entire SQL Server instance, and not the individual databases. To meet this requirement, SQL Server 2008 can participate in a Microsoft Cluster Service Cluster group. A failover cluster appears to clients as a single instance of ...
... Many organizations require high availability solutions that protect the entire SQL Server instance, and not the individual databases. To meet this requirement, SQL Server 2008 can participate in a Microsoft Cluster Service Cluster group. A failover cluster appears to clients as a single instance of ...
Tandem Computers
Tandem Computers, Inc. was the dominant manufacturer of fault-tolerant computer systems for ATM networks, banks, stock exchanges, telephone switching centers, and other similar commercial transaction processing applications requiring maximum uptime and zero data loss. The company was founded in 1974 and remained independent until 1997. It is now a server division within Hewlett Packard.Tandem's NonStop systems use a number of independent identical processors and redundant storage devices and controllers to provide automatic high-speed ""failover"" in the case of a hardware or software failure. To contain the scope of failures and of corrupted data, these multi-computer systems have no shared central components, not even main memory. Conventional multi-computer systems all use shared memories and work directly on shared data objects. Instead, NonStop processors cooperate by exchanging messages across a reliable fabric, and software takes periodic snapshots for possible rollback of program memory state.Besides handling failures well, this ""shared-nothing"" messaging system design also scales extremely well to the largest commercial workloads. Each doubling of the total number of processors would double system throughput, up to the maximum configuration of 4000 processors. In contrast, the performance of conventional multiprocessor systems is limited by the speed of some shared memory, bus, or switch. Adding more than 4–8 processors that way gives no further system speedup. NonStop systems have more often been bought to meet scaling requirements than for extreme fault tolerance. They compete well against IBM's largest mainframes, despite being built from simpler minicomputer technology.