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Oracle, PL-SQL Programming
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%type - cursors, %TYPE: This attribute gives the datatype of a formerly...
%TYPE: This attribute gives the datatype of a formerly declared collection, cursor variable, object, field, record, database column, or variable. Datatype: This is simply
Using %type-declarations in sql, Using %TYPE The %TYPE attribute gives th...
Using %TYPE The %TYPE attribute gives the datatype of a variable or the database column. In the example below, the %TYPE gives the datatype of a variable: credit REAL(7,2); debi
Example of cast operator - sql, Example of Cast Operator So long as C...
Example of Cast Operator So long as CAST is used as shown, we could obtain the total marks for each exam in similar fashion, using SUM (Mark) AS TotalMarks. However, this giv
Example of foreign key constraint - sql, Example of Foreign Key Constraint ...
Example of Foreign Key Constraint Example: Alternative formulation for 6.3 as a foreign key constraint ALTER TABLE EXAM_MARK ADD CONSTRAINT Must_be_enrolled_to_take_exam
Updating a variable, Updating a Variable Assignment of an attribute va...
Updating a Variable Assignment of an attribute value in a variable of a structured type Synatx: SET SN.C = 'S2'; As in Example the entire statement is equivalent to a
What is a collection, What Is a Collection The collection is an ordered...
What Is a Collection The collection is an ordered group of elements, all of similar type (for e.g. the grades for a class of students). Each element has a unique subscript whic
Components of an object type - attributes in pl/sql, Attributes: Just ...
Attributes: Just similar to variable, an attribute is declared with a name and datatype. The name should be exclusive within the object type. The datatype can be any Oracle ty
Pl sql code review, PL SQL Code Review HEADER ELEMENTS File Name ...
PL SQL Code Review HEADER ELEMENTS File Name Clear, meaningful and descriptive about main objective of the file. Multiple words are joined using underscores which adh
Order of evaluation-pl/sql expressions , Order of Evaluation When you do...
Order of Evaluation When you do not use the parentheses to specify the order of evaluation, the operator precedence determine the order. Now compare the expressions below: NOT
Anatomy of a table, Anatomy of a Table: Figure shows the terminology u...
Anatomy of a Table: Figure shows the terminology used in SQL to refer to parts of the structure of a table. As you can see, SQL has no official terms for its counterpa
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