Each key is unique, and is used to locate the corresponding value. Using a key-value pair for the first time adds that pair to the associative array.Using the same key with a different value changes the value.− The advantages of removing transitive dependencies are mainly two-fold.
You can define collection types in a procedure, function, or package.You can pass collection variables as parameters, to move data between client-side applications and stored subprograms.CREATE TABLE CUSTOMERS( CUST_ID INT NOT NULL, CUST_NAME VARCHAR (20) NOT NULL, DOB DATE, STREET VARCHAR(200), CITY VARCHAR(100), STATE VARCHAR(100), ZIP VARCHAR(12), EMAIL_ID VARCHAR(256), PRIMARY KEY (CUST_ID) ); The dependency between the zip code and the address is called as a transitive dependency.To comply with the third normal form, all you need to do is to move the Street, City and the State fields into their own table, which you can call as the Zip Code table.It is a general concept that encompasses lists, arrays, and other familiar datatypes.
Each element has a unique subscript that determines its position in the collection.
You can use the database create script at the bottom of this page in the section Creating a test database to do this.
To run the My Database Create Script, open the View menu, and then choose SQL Server Object Explorer or choose the Ctrl \, Ctrl S keys.
PL/SQL offers these collection types: Although collections can have only one dimension, you can model multi-dimensional arrays by creating collections whose elements are also collections.
To use collections in an application, you define one or more PL/SQL types, then define variables of those types.
Ambrose Bierce Many programming techniques use collection types such as arrays, bags, lists, nested tables, sets, and trees.