Functions in Oracle Database 23ai are stored PL/SQL programs that accept parameters, perform operations, and return a single value. Unlike procedures, which may or may not return values, functions are designed to return exactly one result. Functions are particularly useful…
In Oracle Database 23ai, procedures are a core part of PL/SQL programming. They allow you to group multiple SQL and PL/SQL statements into a single reusable block of code. By encapsulating logic inside procedures, developers can improve maintainability, enforce security,…
In Oracle Database 23ai PL/SQL, errors can occur during code execution due to invalid data, missing rows, constraint violations, or runtime issues. Exception handling allows you to gracefully capture and manage these errors instead of letting your program crash. By…
In Oracle Database 23ai, PL/SQL is not limited to single-row queries. Many times you need to process multiple rows one by one—for example, when iterating through employees, orders, or JSON data. This is where cursors become essential. A cursor acts…
Loops are one of the fundamental concepts in any programming language, allowing you to repeat a block of code multiple times until a condition is met. In Oracle Database 23ai PL/SQL, loops are especially useful when processing rows, performing calculations,…
The CASE statement in Oracle PL/SQL is a powerful alternative to IF statements when you want to evaluate multiple conditions more clearly and concisely. In Oracle Database 23ai, you can use the CASE statement both in PL/SQL blocks and directly…
Conditional logic is one of the most essential elements of programming. In Oracle Database 23ai, PL/SQL supports multiple forms of IF statements that help developers execute code based on specific conditions. Whether you are writing a simple check or handling…
When you write PL/SQL programs in Oracle Database 23ai, you often need storage for values that change during program execution and values that should never change. Variables allow you to store and modify data, while constants preserve values that remain…
Oracle Database 23ai is the latest long-term release of Oracle’s database platform, officially launched in 2024. It is the successor to Oracle Database 19c, which was the previous long-term release. Oracle 23ai is different because it introduces AI-native features like…
The ORDER BY clause in Oracle Database 23ai lets you sort the rows returned by a query. Without it, the database can return results in any order. ORDER BY helps you control whether the rows are listed alphabetically, numerically, chronologically,…
The GROUP BY clause in Oracle Database 23ai is used when you want to organize rows into groups and then apply aggregate functions such as COUNT, SUM, AVG, MIN, or MAX. Instead of returning every single row, GROUP BY allows…
The WHERE clause tells Oracle which rows to keep and which to skip. This tutorial shows practical ways to filter data using comparisons, ranges, pattern matching, NULL logic, subqueries, JSON paths, and vector-aware filtering in Oracle Database 23ai. You will…
Every value stored in an Oracle Database must follow a data type. A data type defines what kind of data can be stored, how much space it takes, and what operations you can perform on it. Oracle Database 23ai continues…
The MERGE statement in Oracle Database is a powerful command that combines the functionality of both INSERT and UPDATE. Instead of writing separate SQL commands, MERGE allows you to check whether a row exists and then decide whether to insert…
The DELETE statement in Oracle Database 23ai is used to remove existing rows from a table. Unlike DROP TABLE, which removes the entire table, DELETE only takes away specific records while keeping the table structure intact. This tutorial explains how…
The UPDATE statement in Oracle Database 23ai is used to change existing data in a table. Instead of inserting new rows, UPDATE helps you adjust or fix information that is already stored. This tutorial explains how to use UPDATE step…
Working with a database is all about getting useful information out of it. Oracle Database 23ai gives you a powerful way to do this with the SELECT statement. This tutorial explains in detail how to write SELECT queries, step by…
When you start working with Oracle Database 23ai, one of the first things you need to learn is how to add data into your tables. Inserting data is a basic yet powerful operation because every application depends on storing and…
