ADO.NET Lecture - Information Technology Gate
... • When a database is then created, a field can be specified as a primary key. • Visual Basic will insist that every record have an entry in the primary-key field and that the same entry does not appear in two different records. • If the user tries to enter a record with no data in the primary key, t ...
... • When a database is then created, a field can be specified as a primary key. • Visual Basic will insist that every record have an entry in the primary-key field and that the same entry does not appear in two different records. • If the user tries to enter a record with no data in the primary key, t ...
Kentico CMS Performance Optimization
... View_Newsmax_Article_Joined inner join custom tables WHERE (##WHERE##) ORDER BY ##ORDERBY## // joining a view of views to another table. ...
... View_Newsmax_Article_Joined inner join custom tables WHERE (##WHERE##) ORDER BY ##ORDERBY## // joining a view of views to another table. ...
The Relational Model
... Where do ICs Come From? ICs are based upon the semantics of the realworld enterprise that is being described in the database relations. We can check a database instance to see if an IC is violated, but we can NEVER infer that an IC is true by looking at an instance. ...
... Where do ICs Come From? ICs are based upon the semantics of the realworld enterprise that is being described in the database relations. We can check a database instance to see if an IC is violated, but we can NEVER infer that an IC is true by looking at an instance. ...
Best Practices ® Minimizing Planned Outages IBM
... example, a restaurant that has a website that contains menu information may be able to tolerate the occasional planned outage. On the other hand, any outage (planned or unplanned) on a stock exchange server that handles trade-related transactions would be catastrophic. Investing a significant amount ...
... example, a restaurant that has a website that contains menu information may be able to tolerate the occasional planned outage. On the other hand, any outage (planned or unplanned) on a stock exchange server that handles trade-related transactions would be catastrophic. Investing a significant amount ...
Association Rules Mining for Incremental Database
... scheme for mining association rules pondering the number of database scans, memory consumption, the time and the interestingness of the rules. They removed the disadvantages of APRIORI algorithm by determining an FIS data extracting association algorithm which is proficient in terms of number of dat ...
... scheme for mining association rules pondering the number of database scans, memory consumption, the time and the interestingness of the rules. They removed the disadvantages of APRIORI algorithm by determining an FIS data extracting association algorithm which is proficient in terms of number of dat ...
SQL Server Naming Standards
... that all of the tables for that application would appear in alphabetized lists together. Note that even for the prefix, use PascalCase. This is discussed in Rule 1c. Do not use underscores in your prefixes, which is discussed in more depth in Rule 1d. The last kind of prefix that is acceptable is on ...
... that all of the tables for that application would appear in alphabetized lists together. Note that even for the prefix, use PascalCase. This is discussed in Rule 1c. Do not use underscores in your prefixes, which is discussed in more depth in Rule 1d. The last kind of prefix that is acceptable is on ...
Generic Disaster Recovery Plan
... ,@dbNameStatementDiff NVARCHAR(MAX) ,@LogicalName VARCHAR(255) ,@PhysicalName VARCHAR(255) ,@Type VARCHAR(20)-- Useful if reading the backup headers ,@FileGroupName VARCHAR(255) ,@Size VARCHAR(20) ,@MaxSize VARCHAR(20) ,@filelistStatmt1 VARCHAR(MAX) ,@filelistStatmtDiff VARCHAR(MAX) /* The following ...
... ,@dbNameStatementDiff NVARCHAR(MAX) ,@LogicalName VARCHAR(255) ,@PhysicalName VARCHAR(255) ,@Type VARCHAR(20)-- Useful if reading the backup headers ,@FileGroupName VARCHAR(255) ,@Size VARCHAR(20) ,@MaxSize VARCHAR(20) ,@filelistStatmt1 VARCHAR(MAX) ,@filelistStatmtDiff VARCHAR(MAX) /* The following ...
SAS® and Relational Databases: What You Should Know Before You Code
... Note that the Teradata engine lets you create an index in the same step. The Oracle engine does not have this option. You will probably have to add an index later, using the Pass-Through method. One disadvantage to the libname option is that depending on your RDBMS, you may find yourself timing out ...
... Note that the Teradata engine lets you create an index in the same step. The Oracle engine does not have this option. You will probably have to add an index later, using the Pass-Through method. One disadvantage to the libname option is that depending on your RDBMS, you may find yourself timing out ...
Introduction to database design
... – MySQL: Not case sensitive! ‘Green’=‘green’ – Concatenation: ‘Data’ || ‘base’ = ‘Database’ – LIKE, ‘Dat_b%’ LIKE ‘Database’ • _ matches any single character • % matches any string of 0 or more characters • Car.Color=‘%green%’ is true for all colors with ‘green’ as a substring, e.g. ‘lightgreen’ ‘gr ...
... – MySQL: Not case sensitive! ‘Green’=‘green’ – Concatenation: ‘Data’ || ‘base’ = ‘Database’ – LIKE, ‘Dat_b%’ LIKE ‘Database’ • _ matches any single character • % matches any string of 0 or more characters • Car.Color=‘%green%’ is true for all colors with ‘green’ as a substring, e.g. ‘lightgreen’ ‘gr ...
Child Care Help and Friend Family Web Service Design Merja Paaso
... well. With SQL Server 2014 Express it is possible to create an on-premises database system, a cloud database system or a database system which uses both of them. The download page states that “Microsoft SQL Server 2014 Express is a free, featurerich edition of SQL Server that is ideal for learning, ...
... well. With SQL Server 2014 Express it is possible to create an on-premises database system, a cloud database system or a database system which uses both of them. The download page states that “Microsoft SQL Server 2014 Express is a free, featurerich edition of SQL Server that is ideal for learning, ...
here
... user’s actions do not adversely impact another user’s actions • At the core of concurrency is accessibility. In one extreme, data becomes inaccessible once a user touches the data. This ensures that data that is being considered for update is not shown. In the other extreme, data is always readable. ...
... user’s actions do not adversely impact another user’s actions • At the core of concurrency is accessibility. In one extreme, data becomes inaccessible once a user touches the data. This ensures that data that is being considered for update is not shown. In the other extreme, data is always readable. ...
Backing up of Database using RMAN on ORACLE
... created by the Oracle Corporation. It provides database backup, restore, and recovery capabilities addressing high availability and disaster recovery concerns. Oracle Corporation recommends RMAN as its preferred method for backup and recovery and has written command-line and graphical (via Oracle En ...
... created by the Oracle Corporation. It provides database backup, restore, and recovery capabilities addressing high availability and disaster recovery concerns. Oracle Corporation recommends RMAN as its preferred method for backup and recovery and has written command-line and graphical (via Oracle En ...
Week2 Database Fundamentals(3)
... • The logical layer provides a structure for the data which is known as the conceptual schema • This structure needs to meet the requirements of the users. This is what we will work on when we design databases. • It makes the data available to any application (or several at once) without the designe ...
... • The logical layer provides a structure for the data which is known as the conceptual schema • This structure needs to meet the requirements of the users. This is what we will work on when we design databases. • It makes the data available to any application (or several at once) without the designe ...
slides - CIS @ Temple University
... "select * from instructor where name = ’" + "X’ or ’Y’ = ’Y" + "’" which is: select * from instructor where name = ’X’ or ’Y’ = ’Y’ ...
... "select * from instructor where name = ’" + "X’ or ’Y’ = ’Y" + "’" which is: select * from instructor where name = ’X’ or ’Y’ = ’Y’ ...
original - Kansas State University
... Permits definition of procedures in SQL, with if-then-else statements, for and while loops, etc. more in Chapter 9 ...
... Permits definition of procedures in SQL, with if-then-else statements, for and while loops, etc. more in Chapter 9 ...
transparencies - Indico
... select * from objs, attribs where objs.ID = attribs.OBJ_ID and objs.ID = Y ...
... select * from objs, attribs where objs.ID = attribs.OBJ_ID and objs.ID = Y ...
Databases and Database Programming Robert M. Dondero, Ph.D. Princeton University
... Databases and database management systems ...
... Databases and database management systems ...
Database System Concepts, 6 th Ed
... Is the above code secure? (A)Yes, since we are using prepared statements (B) No, since we are concatenating strings SQL injection can still occur (C)Yes, since we are using executeQuery(); (D) No, since we are using executeQuery(); Database System Concepts - 6th Edition ...
... Is the above code secure? (A)Yes, since we are using prepared statements (B) No, since we are concatenating strings SQL injection can still occur (C)Yes, since we are using executeQuery(); (D) No, since we are using executeQuery(); Database System Concepts - 6th Edition ...
Document
... Consider the view create view department_total_salary(dept_name, total_salary) as select dept_name, sum(salary) from instructor ...
... Consider the view create view department_total_salary(dept_name, total_salary) as select dept_name, sum(salary) from instructor ...
![(Microsoft PowerPoint - lecture11 [Kompatibilitetsl\344ge])](http://s1.studyres.com/store/data/007757660_1-9b130d2379aa95c984836fce769259ed-300x300.png)
(Microsoft PowerPoint - lecture11 [Kompatibilitetsl\344ge])
... • For many programs, we require that ”all or nothing” is executed. – We say a sequence of actions is executed atomically if it is executed either in entirety, or not at all. • The state in the middle is never visible from outside the sequence. ...
... • For many programs, we require that ”all or nothing” is executed. – We say a sequence of actions is executed atomically if it is executed either in entirety, or not at all. • The state in the middle is never visible from outside the sequence. ...
Big-Data-NoSQL-MongoDB-1-HW-Key - Dr. Tom Hicks
... very different fashion from the better known relational databases (RDB). RDBs pre-define the data structure in the database as a series of tables containing fields with well-defined data types. Exposing the data types to the database program allows it to apply a number of optimizations. In contrast, ...
... very different fashion from the better known relational databases (RDB). RDBs pre-define the data structure in the database as a series of tables containing fields with well-defined data types. Exposing the data types to the database program allows it to apply a number of optimizations. In contrast, ...
Using Views with DB2, MS Access, and SQL Server
... the fields and tables in the database with 16 character names to reflect the source names. Our unit writes SAS code to retrieve data from DB2. We shares our SAS code within the unit. We like standardized names for fields and we needed eight character names for fields and tables. So, we developed SAS ...
... the fields and tables in the database with 16 character names to reflect the source names. Our unit writes SAS code to retrieve data from DB2. We shares our SAS code within the unit. We like standardized names for fields and we needed eight character names for fields and tables. So, we developed SAS ...
ppt - DUET
... real tables that physically exist in the database. There are physically stored records and possibly physically stored indexes directly corresponding to the table ...
... real tables that physically exist in the database. There are physically stored records and possibly physically stored indexes directly corresponding to the table ...