Intuitive querying of e-Health data repositories - National e
... organisation and content of the CLEF database highly skilled users of SQL with minimal experience with WYSIWYM were given access to the SNOMED and ICD codes required to build the SQL ...
... organisation and content of the CLEF database highly skilled users of SQL with minimal experience with WYSIWYM were given access to the SNOMED and ICD codes required to build the SQL ...
Chapter 7: Relational Database Design
... That is, there must be one class that an object belongs to which is a subclass of all other classes that the object belongs to Create subclasses such as student-teacher and student-teacher-footballPlayer for each combination When many combinations are possible, creating subclasses for each com ...
... That is, there must be one class that an object belongs to which is a subclass of all other classes that the object belongs to Create subclasses such as student-teacher and student-teacher-footballPlayer for each combination When many combinations are possible, creating subclasses for each com ...
Certain Answers as Objects and Knowledge
... Incomplete databases. These have two types of values: constants (e.g., 1, 2, . . .) and nulls, representing unknown values. We thus assume countably infinite sets of constants, denoted by Const, and of nulls, denoted by Null. Nulls themselves are denoted by ⊥, sometimes with sub- or superscripts. A ...
... Incomplete databases. These have two types of values: constants (e.g., 1, 2, . . .) and nulls, representing unknown values. We thus assume countably infinite sets of constants, denoted by Const, and of nulls, denoted by Null. Nulls themselves are denoted by ⊥, sometimes with sub- or superscripts. A ...
SQL DDL Language
... infrastructure which implements the relational model. Allows for complex definitions of tables, including data types and constraints. • By converting an ER diagram to the relational model, we get abstract definitions that we can reason about • By converting an ER diagram to a set of tables, we defin ...
... infrastructure which implements the relational model. Allows for complex definitions of tables, including data types and constraints. • By converting an ER diagram to the relational model, we get abstract definitions that we can reason about • By converting an ER diagram to a set of tables, we defin ...
RDBMS and SQL
... • Can be applied to one or more tables or views • Can display one or more columns (renaming if desired) • Predicate is optional, and may include usual operators and connectives • Can put results in order by one or more columns • Can group together records with the same value for column(s) • Can also ...
... • Can be applied to one or more tables or views • Can display one or more columns (renaming if desired) • Predicate is optional, and may include usual operators and connectives • Can put results in order by one or more columns • Can group together records with the same value for column(s) • Can also ...
Kroenke-DBC-e02-PP
... tables must be joined back together In a relational database, tables are joined together using the value of the data If a PROJECT has a CUSTOMER, the Customer_ID is stored as a column in the PROJECT table. The value stored in this column can be used to retrieve specific customer information from the ...
... tables must be joined back together In a relational database, tables are joined together using the value of the data If a PROJECT has a CUSTOMER, the Customer_ID is stored as a column in the PROJECT table. The value stored in this column can be used to retrieve specific customer information from the ...
c14-w-sql-php
... - The WHERE clause could specify more than one row of the table - The DROP Command - To delete whole databases or complete tables DROP (TABLE | DATABASE) [IF EXISTS] name DROP TABLE IF EXISTS States ...
... - The WHERE clause could specify more than one row of the table - The DROP Command - To delete whole databases or complete tables DROP (TABLE | DATABASE) [IF EXISTS] name DROP TABLE IF EXISTS States ...
SQL - Electrical and Computer Engineering Department
... numeric(p,d). Fixed point number, with user-specified precision of p digits, with n digits to the right of decimal point. real, double precision. Floating point and double-precision floating point numbers, with machine-dependent precision. float(n). Floating point number, with user-specified precisi ...
... numeric(p,d). Fixed point number, with user-specified precision of p digits, with n digits to the right of decimal point. real, double precision. Floating point and double-precision floating point numbers, with machine-dependent precision. float(n). Floating point number, with user-specified precisi ...
customer-name
... of the following: A relation in the database A constant relation Let E1 and E2 be relational-algebra expressions; the following are ...
... of the following: A relation in the database A constant relation Let E1 and E2 be relational-algebra expressions; the following are ...
Chapter7QBEgood
... statements displayed in this chapter do not comply with the SQL standard presented in Chapters 5 and 6 ...
... statements displayed in this chapter do not comply with the SQL standard presented in Chapters 5 and 6 ...
Implementing SNOMED CT in a Relational Database
... ▪ rf2_import_full_template.sql ▪ Creates tables, imports RF2 files, indexes and generates a range of views, including some linked views that are useful for viewing particular types of data. ...
... ▪ rf2_import_full_template.sql ▪ Creates tables, imports RF2 files, indexes and generates a range of views, including some linked views that are useful for viewing particular types of data. ...
XML - Rose
... These slides use some figures, definitions, and explanations from ElmasriNavathe’s Fundamentals of Database Systems and Molina-Ullman-Widom’s Database Systems ...
... These slides use some figures, definitions, and explanations from ElmasriNavathe’s Fundamentals of Database Systems and Molina-Ullman-Widom’s Database Systems ...
Chapter 4: SQL - CSE, IIT Bombay
... select distinct T.customer_name from depositor as T where not unique ( select R.customer_name from account, depositor as R where T.customer_name = R.customer_name and R.account_number = account.account_number and account.branch_name = 'Perryridge') Variable from outer level is known as a correlati ...
... select distinct T.customer_name from depositor as T where not unique ( select R.customer_name from account, depositor as R where T.customer_name = R.customer_name and R.account_number = account.account_number and account.branch_name = 'Perryridge') Variable from outer level is known as a correlati ...
Performance Tuning
... SELECT * FROM ONEKTUP, TENKTUP1 WHERE (ONEKTUP.unique1 = TENKTUP1.unique1) AND (TENKTUP1.unique1 = TENKTUP2.unique1) AND (TENKTUP1.unique1 < 1000) ...
... SELECT * FROM ONEKTUP, TENKTUP1 WHERE (ONEKTUP.unique1 = TENKTUP1.unique1) AND (TENKTUP1.unique1 = TENKTUP2.unique1) AND (TENKTUP1.unique1 < 1000) ...
Chapter 4: SQL
... select distinct T.customer_name from depositor as T where not unique ( select R.customer_name from account, depositor as R where T.customer_name = R.customer_name and R.account_number = account.account_number and account.branch_name = 'Perryridge') Variable from outer level is known as a correlati ...
... select distinct T.customer_name from depositor as T where not unique ( select R.customer_name from account, depositor as R where T.customer_name = R.customer_name and R.account_number = account.account_number and account.branch_name = 'Perryridge') Variable from outer level is known as a correlati ...
LINQ and LINQ-to-SQL
... the N+1 query problem Using Include(…) method only one SQL query with join is made to get the child entities foreach (var country in countriesEntities.Countries.Include("Cities")) ...
... the N+1 query problem Using Include(…) method only one SQL query with join is made to get the child entities foreach (var country in countriesEntities.Countries.Include("Cities")) ...
Mapping Conceptual Models to Database Schemas
... Notationally, each box in Figure 4.1a represents an entity set, e.g., Room, Guest, and Activity. The diamonds with lines connected to entity sets represent relationship sets among the connected entity sets, e.g., occupies and is signed up f or. The ovals represent attributes, e.g., RoomN r, Date, an ...
... Notationally, each box in Figure 4.1a represents an entity set, e.g., Room, Guest, and Activity. The diamonds with lines connected to entity sets represent relationship sets among the connected entity sets, e.g., occupies and is signed up f or. The ovals represent attributes, e.g., RoomN r, Date, an ...
Document
... Find the names of all branches that have greater assets than some branch located in Brooklyn. select distinct T.branch_name from branch as T, branch as S where T.assets > S.assets and S.branch_city = ‘ Brooklyn’ ...
... Find the names of all branches that have greater assets than some branch located in Brooklyn. select distinct T.branch_name from branch as T, branch as S where T.assets > S.assets and S.branch_city = ‘ Brooklyn’ ...