It sounds like you have a scenario where you want to save data across multiple tables in a database using a single form. Additionally, you want to create a master table to store foreign keys and display the data in the frontend. Let's break down your requirements: 1. Generating a Common ID for Multiple Tables: When you want to add data to multiple tables at once and have them share a common identifier, you typically use a primary key (ID) that is common across all related tables. This can be achieved through database design and relationships. For example, let's say you have four tables: TableA, TableB, TableC, and TableD. Each of these tables has its own data, but they all share a common identifier, which could be a foreign key linking to a MasterTable. Here's a simplified example: CREATE TABLE MasterTable ( MasterID INT PRIMARY KEY, -- Other columns as needed ); CREATE TABLE TableA ( ID INT PRIMARY KEY, MasterID INT, -- Other columns for TableA FOREIGN KEY (MasterID) REFERENCES MasterTable(MasterID) ); -- Repeat the same structure for TableB, TableC, and TableD When you insert data into MasterTable, you generate a unique MasterID and use it as a foreign key in the other tables. This way, you can maintain relationships between the tables. 2. Displaying Table Rows as Columns in the Frontend: If you want to display data from a table row as columns in the frontend, you'll need to use SQL queries or your backend programming language to transform the data before sending it to the frontend. For example, suppose you have a table named Data: CREATE TABLE Data ( ID INT PRIMARY KEY, MasterID INT, ColumnName VARCHAR(50), ColumnValue VARCHAR(50), FOREIGN KEY (MasterID) REFERENCES MasterTable(MasterID) ); This table stores data in a key-value pair format, where each row represents a piece of data related to a MasterID. To display this data with columns dynamically created based on the ColumnName values, you can use a pivot query. Here's a simplified example in SQL: SELECT MasterID, MAX(CASE WHEN ColumnName = 'Column1' THEN ColumnValue END) AS Column1, MAX(CASE WHEN ColumnName = 'Column2' THEN ColumnValue END) AS Column2, -- Add more columns as needed FROM Data GROUP BY MasterID; This query transforms rows into columns based on the unique values in the ColumnName column. Keep in mind that the specifics of these solutions might depend on the exact requirements of your application, the database system you're usin

JDK, JRE, and JVM are all key components of the Java programming language, each serving a specific role in the Java development and execution process:

JDK (Java Development Kit):

The JDK is a software development kit that includes tools and resources necessary for developing Java applications.
It contains the Java compiler (javac), debugger, libraries, documentation, and other utilities needed for Java development.
Developers use the JDK to write, compile, and debug Java code.
JRE (Java Runtime Environment):

The JRE is a part of the JDK but can also be installed separately.
It provides the runtime environment for Java applications to run. It includes the Java Virtual Machine (JVM), class libraries, and other files that support the execution of Java applications.
Users who only want to run Java applications, without the need for development, typically need the JRE.
JVM (Java Virtual Machine):

The JVM is an abstract machine that provides a runtime environment for Java bytecode to be executed.
When a Java program is compiled, it is translated into bytecode, which is then interpreted and executed by the JVM.
The JVM is platform-dependent, meaning there are different implementations for different operating systems. It abstracts the hardware and operating system details, allowing Java programs to be executed in a "write once, run anywhere" manner.