ER Diagram for the movie database
... track of. Each of our movies has a DVD or VHS tape number. For each movie, we need to know its title and category (e.g., comedy, suspense, drama, action, war, or sci-fi). Yes, we do have multiple copies of many of our movies. We give each movie a specific ID, and then track which DVD or VHS contains ...
... track of. Each of our movies has a DVD or VHS tape number. For each movie, we need to know its title and category (e.g., comedy, suspense, drama, action, war, or sci-fi). Yes, we do have multiple copies of many of our movies. We give each movie a specific ID, and then track which DVD or VHS contains ...
Slide 1
... characteristics of an existing column? • MODIFY clause of ALTER TABLE command changes characteristics of existing columns ...
... characteristics of an existing column? • MODIFY clause of ALTER TABLE command changes characteristics of existing columns ...
Table 2.1 Simple Visual Basic Data Types
... Dim SQL As String SQL = "INSERT INTO Employee " SQL = SQL & "(EmpName, BirthDate, PayRate, Manager)" SQL = SQL & " VALUES (" SQL = SQL & DBTextFmt(txtEmpName.Text) & ", " SQL = SQL & CStr(DBDateFmt(txtBirthdate)) & ", " SQL = SQL & txtPayRate.Text & ", " SQL = SQL & txtMgr.Text & ")" Call fEmpDB.Exe ...
... Dim SQL As String SQL = "INSERT INTO Employee " SQL = SQL & "(EmpName, BirthDate, PayRate, Manager)" SQL = SQL & " VALUES (" SQL = SQL & DBTextFmt(txtEmpName.Text) & ", " SQL = SQL & CStr(DBDateFmt(txtBirthdate)) & ", " SQL = SQL & txtPayRate.Text & ", " SQL = SQL & txtMgr.Text & ")" Call fEmpDB.Exe ...
PowerPoint Template - Uttaradit Rajabhat University
... Semicolon after SQL Statements? Some database systems require a semicolon at the end of each SQL statement. Semicolon is the standard way to separate each SQL statement in database systems that allow more than one SQL statement to be executed in the same call to the server. We are using Oracle and ...
... Semicolon after SQL Statements? Some database systems require a semicolon at the end of each SQL statement. Semicolon is the standard way to separate each SQL statement in database systems that allow more than one SQL statement to be executed in the same call to the server. We are using Oracle and ...
List of features implemented in Sculptor 6 SQL
... Changes made to this document since the previous version are shown in blue. Introduction The Sculptor SQL implementation is based entirely on the SQL-92 standard. The entire SQL-92 parser has been coded but the engine is still under development and not all constructions are currently implemented. Su ...
... Changes made to this document since the previous version are shown in blue. Introduction The Sculptor SQL implementation is based entirely on the SQL-92 standard. The entire SQL-92 parser has been coded but the engine is still under development and not all constructions are currently implemented. Su ...
dept_name
... An assertion is a predicate expressing a condition that we wish the database always to satisfy ...
... An assertion is a predicate expressing a condition that we wish the database always to satisfy ...
Outline of topics covered in the SQL fundamental series
... Prepared by Jennifer Kreie, Associate Professor Accounting & Information Systems Department College of Business, New Mexico State University The purpose of this set of Power Point slides and videos is to introduce SQL fundamentals using the Oracle database software and Oracle’s SQL Developer as the ...
... Prepared by Jennifer Kreie, Associate Professor Accounting & Information Systems Department College of Business, New Mexico State University The purpose of this set of Power Point slides and videos is to introduce SQL fundamentals using the Oracle database software and Oracle’s SQL Developer as the ...
Lecture 3: MySQL
... region names and 300 wineries in the sample database! In fact, the size of the output can be accurately calculated as the total number of rows in the first table multiplied by the total rows in the second table. In this case, the output is 4 x ...
... region names and 300 wineries in the sample database! In fact, the size of the output can be accurately calculated as the total number of rows in the first table multiplied by the total rows in the second table. In this case, the output is 4 x ...
SQL Wildcards
... The SQL DROP TABLE statement is used to remove a table definition and all data, indexes, triggers, constraints, and permission specifications for that table. NOTE: You have to be careful while using this command because once a table is deleted then all the information available in the table woul ...
... The SQL DROP TABLE statement is used to remove a table definition and all data, indexes, triggers, constraints, and permission specifications for that table. NOTE: You have to be careful while using this command because once a table is deleted then all the information available in the table woul ...
Document
... Simple and easy to use. There is a diverse array of SQL implementations. Considered to be great for handling very large database needs. ...
... Simple and easy to use. There is a diverse array of SQL implementations. Considered to be great for handling very large database needs. ...
Javier Villegas – DBA | MCP | MCTS
... SQL Server and Windows Version and Edition MAXDOP Cluster Database Mirroring/AlwaysOn Network Active Transactions Transactions per second Active connections Performance Monitor counters related to I/O using PowerShell I/O Latency ...
... SQL Server and Windows Version and Edition MAXDOP Cluster Database Mirroring/AlwaysOn Network Active Transactions Transactions per second Active connections Performance Monitor counters related to I/O using PowerShell I/O Latency ...
SQL: Programming Motivation JDBC Connections Statements Query
... " SQL commands are embedded in application code " A precompiler checks these commands at compile-time and convert them into DBMS-specific API calls " Examples: embedded SQL for C/C++, SQLJ (for Java) ...
... " SQL commands are embedded in application code " A precompiler checks these commands at compile-time and convert them into DBMS-specific API calls " Examples: embedded SQL for C/C++, SQLJ (for Java) ...
Review for Final Exam
... 1NF: The domain of an attribute must contain only atomic values and the value of any attribute in a tuple must be a single value from the domain of that attribute. Def. If XY Z and X Z then XY Z is a partial dependency and X Z is a full functional dependency. So, Z is fully functionally depe ...
... 1NF: The domain of an attribute must contain only atomic values and the value of any attribute in a tuple must be a single value from the domain of that attribute. Def. If XY Z and X Z then XY Z is a partial dependency and X Z is a full functional dependency. So, Z is fully functionally depe ...
Idaho1 - University of Tulsa
... evaluate a faulty query if the WHERE condition is true For example... ...
... evaluate a faulty query if the WHERE condition is true For example... ...
Lecture 5 (SQL data definition)
... query Language, part of an IBM project in the 70’s • Sequel was already taken, so it became SQL - Structured Query Language ...
... query Language, part of an IBM project in the 70’s • Sequel was already taken, so it became SQL - Structured Query Language ...
Combining SQL and Conventional Programming Languages
... Relational data model doesn't match well with data model of conventional programming languages (e.g., data structure mismatch) No pointers, loops or branches in SQL No convenient input and output (e.g., formatting) ...
... Relational data model doesn't match well with data model of conventional programming languages (e.g., data structure mismatch) No pointers, loops or branches in SQL No convenient input and output (e.g., formatting) ...
LECTURE 4 DATABASE PROGRAMMING SQL FUNCTION ON PL
... SET credit_limit = max_allowed WHERE type = ‘EMPOLEE ‘OR type = good_cust ; END; ...
... SET credit_limit = max_allowed WHERE type = ‘EMPOLEE ‘OR type = good_cust ; END; ...
slides (6pp)
... Statement myStmt = myCon.createStatement(); ResultSet rs = myStmt.executeQuery( ”SELECT code, name, period, teacher ” + ”FROM Courses, GivenCourses ” + ”WHERE code = course ” + ”ORDER BY code, period”); Compare with previous row to see if this is a new course. String currentCourse, course; If it is, ...
... Statement myStmt = myCon.createStatement(); ResultSet rs = myStmt.executeQuery( ”SELECT code, name, period, teacher ” + ”FROM Courses, GivenCourses ” + ”WHERE code = course ” + ”ORDER BY code, period”); Compare with previous row to see if this is a new course. String currentCourse, course; If it is, ...
Fundamentals of Database Systems
... I TIME provides time values (hour, minute, second). The number of digits for seconds can be put in as a parameter. I For other domains or variants refer to system manuals. ...
... I TIME provides time values (hour, minute, second). The number of digits for seconds can be put in as a parameter. I For other domains or variants refer to system manuals. ...
The Importance of Column Names - Department of Computer Science
... that spawned SQL in the 1970s. Nor should it be taken as any kind of personal criticism of the System R engineers. They did a brilliant job and achieved their stated objective. The resulting acclaim was richly deserved but should not, in my opinion, have resulted in acceptance of the ad hoc language ...
... that spawned SQL in the 1970s. Nor should it be taken as any kind of personal criticism of the System R engineers. They did a brilliant job and achieved their stated objective. The resulting acclaim was richly deserved but should not, in my opinion, have resulted in acceptance of the ad hoc language ...
Fundamentals of Database Systems
... ▶ DATE provides date values (year, month, day). ▶ TIME provides time values (hour, minute, second). The number of digits for seconds can be put in as a parameter. ▶ For other domains or variants refer to system manuals. ...
... ▶ DATE provides date values (year, month, day). ▶ TIME provides time values (hour, minute, second). The number of digits for seconds can be put in as a parameter. ▶ For other domains or variants refer to system manuals. ...
Null (SQL)
Null is a special marker used in Structured Query Language (SQL) to indicate that a data value does not exist in the database. Introduced by the creator of the relational database model, E. F. Codd, SQL Null serves to fulfill the requirement that all true relational database management systems (RDBMS) support a representation of ""missing information and inapplicable information"". Codd also introduced the use of the lowercase Greek omega (ω) symbol to represent Null in database theory. NULL is also an SQL reserved keyword used to identify the Null special marker.For people new to the subject, a good way to remember what null means is to remember that in terms of information, ""lack of a value"" is not the same thing as ""a value of zero""; similarly, ""lack of an answer"" is not the same thing as ""an answer of no"". For example, consider the question ""How many books does Juan own?"" The answer may be ""zero"" (we know that he owns none) or ""null"" (we do not know how many he owns, or doesn't own). In a database table, the column reporting this answer would start out with a value of null, and it would not be updated with ""zero"" until we have ascertained that Juan owns no books.SQL null is a state (unknown) and not a value. This usage is quite different from most programming languages, where null means not assigned to a particular instance.