ULL, Title VARCHAR2(30), TitleOfCourtesy VARCHAR2(25), BirthDate DATE, HireDate DATE, Address VARCHAR2(60), City VARCHAR2(15), Region VARCHAR2(15), PostalCode VARCHAR2(10), Country VARCHAR2(15), HomePhone VARCHAR2(24), Extension VARCHAR2(4), Photo LONG RAW, Notes VARCHAR2(600), ReportsTo NUMBER, PhotoPath V
Control structures
Control structures are block of statements that analyze the value of variables and determine the flow of execution based on those values. When a program is running, the CPU executes the code line by line. After sometime, the program reaches the point where it has to make a decision on whether it has to go to another part of the code or repeat execution of certain part of the code. These results affect the flow of the program's code and these are called control structures.
Switch Statement
The switch statement is a key feature that is used by the programmers a lot in the world of programming and coding, as well as in information technology in general. The switch statement is a selection control mechanism that allows the variable value to change the order of the individual statements in the software execution via search.
Create a PL/SQL block to retrieve and display information for all employees. Display the employee ID, manager ID, date of hire, and if any of the employee territories is in the region "Southern".
CREATE TABLE Employees ( EmployeeID NUMBER NOT NULL, LastName VARCHAR2(20) NOT NULL, FirstName VARCHAR2(10) NOT NULL, Title VARCHAR2(30), TitleOfCourtesy VARCHAR2(25), BirthDate DATE, HireDate DATE, Address VARCHAR2(60), City VARCHAR2(15), Region VARCHAR2(15), PostalCode VARCHAR2(10), Country VARCHAR2(15), HomePhone VARCHAR2(24), Extension VARCHAR2(4), Photo LONG RAW, Notes VARCHAR2(600), ReportsTo NUMBER, PhotoPath VARCHAR2(255), CONSTRAINT PK_Employees PRIMARY KEY (EmployeeID), CONSTRAINT FK_Employees_Employees FOREIGN KEY (ReportsTo) REFERENCES Employees(EmployeeID) ) /
CREATE TABLE EmployeeTerritories ( EmployeeID NUMBER NOT NULL, TerritoryID VARCHAR2(20) NOT NULL, CONSTRAINT PK_EmpTerritories PRIMARY KEY (EmployeeID, TerritoryID), CONSTRAINT FK_EmpTerri_Employees FOREIGN KEY (EmployeeID) REFERENCES Employees(EmployeeID), CONSTRAINT FK_EmpTerri_Territories FOREIGN KEY (TerritoryID) REFERENCES Territories(TerritoryID) ) /
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