Lecture 3: MySQL
... Databases are managed by a relational database management system (RDBMS). An RDBMS supports a database language to create and delete databases and to manage and search data. The database language used in almost all DBMSs is SQL. ...
... Databases are managed by a relational database management system (RDBMS). An RDBMS supports a database language to create and delete databases and to manage and search data. The database language used in almost all DBMSs is SQL. ...
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... C. The SQL* Loader operation fails because no record terminators are specified. D. Field names should be the first line in the both the SQL* Loader data files. E. The SQL* Loader operation assumes that the file must be a stream record format file with the normal carriage return string as the record ...
... C. The SQL* Loader operation fails because no record terminators are specified. D. Field names should be the first line in the both the SQL* Loader data files. E. The SQL* Loader operation assumes that the file must be a stream record format file with the normal carriage return string as the record ...
CH04
... SQL/CLI permits an application written in one of the usual host languages to issue database requests, not via embedded SQL, but rather by invoking certain vendor-provided routines. Those routines use dynamic SQL to perform the requested database operations on the application’s behalf. Reasons: 1. SQ ...
... SQL/CLI permits an application written in one of the usual host languages to issue database requests, not via embedded SQL, but rather by invoking certain vendor-provided routines. Those routines use dynamic SQL to perform the requested database operations on the application’s behalf. Reasons: 1. SQ ...
SQL Server and Oracle
... That is why we chose to once-only convert Adlib databases (filled or empty) to a relational database, if the customer would like to use this functionality. (Note that its use and support for it, cost extra. Our sales department can tell you more about it.) After that conversion, the Adlib databases ...
... That is why we chose to once-only convert Adlib databases (filled or empty) to a relational database, if the customer would like to use this functionality. (Note that its use and support for it, cost extra. Our sales department can tell you more about it.) After that conversion, the Adlib databases ...
dept_name
... Values of attributes before and after an update can be referenced: create trigger setnull-trigger before update on r referencing new row as nrow for each row when nrow.phone-number = ‘’ set nrow.phone-number = null ...
... Values of attributes before and after an update can be referenced: create trigger setnull-trigger before update on r referencing new row as nrow for each row when nrow.phone-number = ‘’ set nrow.phone-number = null ...
A SQL:1999 Code Generator for the Pathfinder XQuery
... plan DAGs. Pathfinder makes aggressive use of relational properties—e.g., keys, functional and multi-valued dependencies, inclusion of active attribute domains—to reduce the size of the plan DAGs (cutting down the typical operator count of 30–300 by more than 50 %) and to realize other plan enhancem ...
... plan DAGs. Pathfinder makes aggressive use of relational properties—e.g., keys, functional and multi-valued dependencies, inclusion of active attribute domains—to reduce the size of the plan DAGs (cutting down the typical operator count of 30–300 by more than 50 %) and to realize other plan enhancem ...
RDBMS and SQL
... • Can be subsets of base tables, or subsets of joins, or contain calculated data • Reasons for views – Allow different users to see the data in different forms – Provide a simple authorization control device – Free users from complicated DML operations – If database is restructured, view can keep th ...
... • Can be subsets of base tables, or subsets of joins, or contain calculated data • Reasons for views – Allow different users to see the data in different forms – Provide a simple authorization control device – Free users from complicated DML operations – If database is restructured, view can keep th ...
Chapter 1 - Eastern Illinois University
... Oracle8i, released in the spring of 1999, enhanced the original release of Oracle8 in two primary areas: data warehousing and Web-based application development. For data warehousing, Oracle8i includes many new features specifically designed to increase the performance of complex query processing, su ...
... Oracle8i, released in the spring of 1999, enhanced the original release of Oracle8 in two primary areas: data warehousing and Web-based application development. For data warehousing, Oracle8i includes many new features specifically designed to increase the performance of complex query processing, su ...
SQL Azure Database
... • Higher availability – app still runs if server is unreachable • Reduced network utilization – most data access is local ...
... • Higher availability – app still runs if server is unreachable • Reduced network utilization – most data access is local ...
Chapter 9
... • Triggers will fire regardless of the source of the event • DML triggers are specifically associated with a table or view ...
... • Triggers will fire regardless of the source of the event • DML triggers are specifically associated with a table or view ...
Fundamentals of Database Systems
... Most SQL statements can be embedded in a general-purpose host programming language such as COBOL, C, Java An embedded SQL statement is distinguished from the host language statements by EXEC SQL and a matching END-EXEC (or semicolon) – shared variables (used in both languages) usually prefixed with ...
... Most SQL statements can be embedded in a general-purpose host programming language such as COBOL, C, Java An embedded SQL statement is distinguished from the host language statements by EXEC SQL and a matching END-EXEC (or semicolon) – shared variables (used in both languages) usually prefixed with ...
Chapter 13
... - ODBC is an API for a set of objects and methods that are an interface to different databases - Database vendors provide ODBC drivers for their products – the drivers implement the ODBC objects and methods - An application can include SQL statements that work for any database for which a driver is ...
... - ODBC is an API for a set of objects and methods that are an interface to different databases - Database vendors provide ODBC drivers for their products – the drivers implement the ODBC objects and methods - An application can include SQL statements that work for any database for which a driver is ...
SQL Server Performance Tuning and Optimization
... Know the performance and scalability characteristics of queries ...
... Know the performance and scalability characteristics of queries ...
Module 1: Getting Started with Databases and Transact
... What Are T-SQL Variables? A Transact-SQL local variable is an object that can hold a single data value of a specific type Variables in batches and scripts are typically used to: • Count the number of times a loop is performed • Hold data to be tested by a control-of-flow statement • Save data value ...
... What Are T-SQL Variables? A Transact-SQL local variable is an object that can hold a single data value of a specific type Variables in batches and scripts are typically used to: • Count the number of times a loop is performed • Hold data to be tested by a control-of-flow statement • Save data value ...
Chapter 13 - kuroski.net
... - Related to ODBC - JDBC is a standard protocol that can be implemented as a driver for any database system - JDBC allows SQL to be embedded in Java applications, applets, and servlets - JDBC has the advantage of portability over embedded SQL ...
... - Related to ODBC - JDBC is a standard protocol that can be implemented as a driver for any database system - JDBC allows SQL to be embedded in Java applications, applets, and servlets - JDBC has the advantage of portability over embedded SQL ...
Getting Started with Databases and Transact
... What Are T-SQL Variables? A Transact-SQL local variable is an object that can hold a single data value of a specific type Variables in batches and scripts are typically used to: • Count the number of times a loop is performed • Hold data to be tested by a control-of-flow statement • Save data value ...
... What Are T-SQL Variables? A Transact-SQL local variable is an object that can hold a single data value of a specific type Variables in batches and scripts are typically used to: • Count the number of times a loop is performed • Hold data to be tested by a control-of-flow statement • Save data value ...
SQL Overview
... SQL is followed by unique set of rules and guidelines called Syntax. This tutorial gives you a quick start with SQL by listing all the basic SQL Syntax: All the SQL statements start with any of the keywords like SELECT, INSERT, UPDATE, DELETE, ALTER, DROP, CREATE, USE, SHOW and all the statements en ...
... SQL is followed by unique set of rules and guidelines called Syntax. This tutorial gives you a quick start with SQL by listing all the basic SQL Syntax: All the SQL statements start with any of the keywords like SELECT, INSERT, UPDATE, DELETE, ALTER, DROP, CREATE, USE, SHOW and all the statements en ...
lecture notes
... if (!rs.next()) throw new Exception ("Wrong number of rows"); if (rs.getInt(1)!=300) throw new Exception ("Wrong row returned"); if (!rs.next()) throw new Exception ("Wrong number of rows"); if (rs.getInt(1)!=1910) throw new Exception ("Wrong row returned") if (rs.next()) throw new Exception ("Wrong ...
... if (!rs.next()) throw new Exception ("Wrong number of rows"); if (rs.getInt(1)!=300) throw new Exception ("Wrong row returned"); if (!rs.next()) throw new Exception ("Wrong number of rows"); if (rs.getInt(1)!=1910) throw new Exception ("Wrong row returned") if (rs.next()) throw new Exception ("Wrong ...
What is Fathom Trend database ? (cont.)
... Puts Ad Hoc reporting in the hands of its end users • no need to involve IT to get a new report ...
... Puts Ad Hoc reporting in the hands of its end users • no need to involve IT to get a new report ...
ACM Proceedings Template - WORD
... actually include one of those characters in a string, we can precede them with a backslash (\), a process called escaping. To escape an apostrophe (') mark in order to include it in the string another apostrophe is used. While it is easy to escape those special characters, input validation cannot ea ...
... actually include one of those characters in a string, we can precede them with a backslash (\), a process called escaping. To escape an apostrophe (') mark in order to include it in the string another apostrophe is used. While it is easy to escape those special characters, input validation cannot ea ...
Database Applications
... Cursors: a mechanism for handling sets in languages which do not support these as fundamental types. ...
... Cursors: a mechanism for handling sets in languages which do not support these as fundamental types. ...
Introduction to Relational Databases and SQL
... Remember, the idea behind relational databases was that the database management system (DBMS) would itself keep track of all table relationships independent of hardware or outside programming languages. Thus a language to query data from multiple tables could be much more high level and easy to use. ...
... Remember, the idea behind relational databases was that the database management system (DBMS) would itself keep track of all table relationships independent of hardware or outside programming languages. Thus a language to query data from multiple tables could be much more high level and easy to use. ...
Chapter 15 Duplicating Databases and Transporting Data
... You must start the auxiliary instance with the nomount option. You can’t use a standby database as the target database. You’ll need the password file for the auxiliary instance only if you’re using the RMAN client on a different host than the auxiliary host or if you duplicate from an active d ...
... You must start the auxiliary instance with the nomount option. You can’t use a standby database as the target database. You’ll need the password file for the auxiliary instance only if you’re using the RMAN client on a different host than the auxiliary host or if you duplicate from an active d ...
DBase
dBase (also stylized dBASE) was one of the first database management systems for microcomputers, and the most successful in its day. The dBase system includes the core database engine, a query system, a forms engine, and a programming language that ties all of these components together. dBase's underlying file format, the .dbf file, is widely used in applications needing a simple format to store structured data.dBase was originally published by Ashton-Tate for microcomputer operating system CP/M in 1980, and later ported to Apple II and IBM PC computers running DOS. On the PC platform, in particular, dBase became one of the best-selling software titles for a number of years. A major upgrade was released as dBase III, and ported to a wider variety of platforms, adding UNIX, and VMS. By the mid-1980s, Ashton-Tate was one of the ""big three"" software publishers in the early business software market, the others being Lotus Development and WordPerfect.Starting in the mid-1980s, several companies produced their own variations on the dBase product and especially the dBase programming language. These included FoxBASE+(later renamed FoxPro), Clipper, and other so-called xBase products. Many of these were technically stronger than dBase, but could not push it aside in the market. This changed with the disastrous introduction of dBase IV, whose design and stability were so poor that many users switched to other products. At the same time, there was growing use of IBM-invented SQL (Structured Query Language) in database products. Another factor was user adoption of Microsoft Windows on desktop computers. The shift toward SQL and Windows put pressure on the makers of xBase products to invest in major redesign to provide new capabilities.In spite of growing pressure to evolve, in the early 1990s xBase products constituted the leading database platform for implementing business applications. The size and impact of the xBase market did not go unnoticed, and within one year, the three top xBase firms were acquired by larger software companies. Borland purchased Ashton-Tate, Microsoft bought Fox Software, and Computer Associates acquired Nantucket. However, by the following decade most of the original xBase products had faded from prominence and several disappeared. Products known as dBase still exist, owned by dBase LLC.