PL/SQL variables can be declared in two ways. First one is by using the in-built data types. Second method is by using existing database objects in variable declaration instead of…
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In addition to PL/SQL variables and constants, you can use variables in two ways. PL/SQL Substitution and Bind Variables allow you pass on values to PL/SQL programs while execution. Lets…
Variables and constants are the most important lexical elements in any programming language. The ability to declare and use variables by PL/SQL is one of its advantages over SQL. We…
Data type in any programming language lets programmer identify and define the kind of data they will use in their codes. These data types can be numbers, text, dates, images,…
When you create a schema, it may be possible that you forget to add some columns or constraints in a table. SQL Alter Table Statement gives you the capability to…
A roadmap must be followed to produce a well functioning Machine Learning model. The strength of the algorithm determines the results it will gauge. Machine learning can be classified into…
You need to learn certain basic things about PL/SQL before you begin creating code blocks in PL/SQL. Here are some PL/SQL fundamentals for you to remember. PL/SQL is NOT Case-Sensitive…
PL/SQL architecture defines how the PL/SQL blocks are executed in Oracle. Oracle provides PL/SQL engine that executes the Procedural Language part of a block. When an application program or a…
An important aspect of database systems is creation of external schemas for different users and their needs. These are also known as external views for users. One way of doing…
Subquery in SQL or nesting a query within another query is an extremely important concept in SQL. It allows the programmer to fetch rows from one table depending upon the…