Sql to java online

MySQL online editor

Write, Run & Share MySQL queries online using OneCompiler’s MySQL online editor and compiler for free. It’s one of the robust, feature-rich online editor and compiler for MySQL. Getting started with the OneCompiler’s MySQL editor is really simple and pretty fast. The editor shows sample boilerplate code when you choose language as ‘MySQL’ and start writing queries to learn and test online without worrying about tedious process of installation.

About MySQL

MySQL is a open-source, free and very popular relational database management system which is developed, distributed and supported by Oracle corporation.

Key Features:

• Open-source relational database management systems.
• Reliable, very fast and easy to use database server.
• Works on client-server model.
• Highly Secure and Scalable
• High Performance
• High productivity as it uses stored procedures, triggers, views to write a highly productive code.
• Supports large databases efficiently.
• Supports many operating systems like Linux*,CentOS*, Solaris*,Ubuntu*,Windows*, MacOS*,FreeBSD* and others.

Syntax help

Commands

1. CREATE

CREATE TABLE table_name ( column1 datatype, column2 datatype, . );

Example

CREATE TABLE EMPLOYEE ( empId INTEGER PRIMARY KEY, name TEXT NOT NULL, dept TEXT NOT NULL );

2. ALTER

ALTER TABLE Table_name ADD column_name datatype;

Example

INSERT INTO EMPLOYEE VALUES (0001, 'Dave', 'Sales');

3. TRUNCATE

TRUNCATE table table_name;

4. DROP

5. RENAME

RENAME TABLE table_name1 to new_table_name1; 

6. COMMENT

Single-Line Comments:

Multi-Line comments:

DML Commands

1. INSERT

INSERT INTO table_name (column1, column2, column3, . ) VALUES (value1, value2, value3, . );

Note: Column names are optional.

Example

INSERT INTO EMPLOYEE VALUES (0001, 'Ava', 'Sales');

2. SELECT

SELECT column1, column2, . FROM table_name [where condition]; 

Example

SELECT * FROM EMPLOYEE where dept ='sales';

3. UPDATE

UPDATE table_name SET column1 = value1, column2 = value2, . WHERE condition; 

Example

UPDATE EMPLOYEE SET dept = 'Sales' WHERE empId='0001'; 

4. DELETE

DELETE FROM table_name where condition;

Example

DELETE from EMPLOYEE where empId='0001'; 

Indexes

1. CREATE INDEX

 CREATE INDEX index_name on table_name(column_name);

 CREATE UNIQUE INDEX index_name on table_name(column_name);

2. DROP INDEX

DROP INDEX index_name ON table_name;

Views

1. Create a View

Creating a View: CREATE VIEW View_name AS Query;

2. How to call view

3. Altering a View

ALTER View View_name AS Query;

4. Deleting a View

Triggers

1. Create a Trigger

CREATE TRIGGER trigger_name trigger_time trigger_event ON tbl_name FOR EACH ROW [trigger_order] trigger_body /* where trigger_time: < BEFORE | AFTER >trigger_event: < INSERT | UPDATE | DELETE >trigger_order: < FOLLOWS | PRECEDES >*/

2. Drop a Trigger

DROP TRIGGER [IF EXISTS] trigger_name;

Stored Procedures

1. Create a Stored Procedure

CREATE PROCEDURE sp_name(p1 datatype) BEGIN /*Stored procedure code*/ END;

2. How to call Stored procedure

3. How to delete stored procedure

Joins

1. INNER JOIN

SELECT * FROM TABLE1 INNER JOIN TABLE2 where condition;

2. LEFT JOIN

SELECT * FROM TABLE1 LEFT JOIN TABLE2 ON condition;

3. RIGHT JOIN

SELECT * FROM TABLE1 RIGHT JOIN TABLE2 ON condition;

4. CROSS JOIN

SELECT select_list from TABLE1 CROSS JOIN TABLE2;

Источник

Online SQL to JAVA Conversion

Conholdate SQL to JAVA Conversion is cross platform and cross browser conversion app that allow you to convert SQL to JAVA in any modern browser (Chrome, Safari, Firefox, Opera, Tor, etc) and on any OS (Windows, Unix and MacOS) despite your PC specifications. Converted SQL to JAVA will maintain original document structure, content and styles. SQL to JAVA Convertor app is built on top of high quality document conversion engine which provides outstanding conversion results and performance, our goal is to offer secure and best conversion experience to our users. Conholdate.Conversion app offers an OCR feature that allows you to parse image files and export data into Excel documents, for example convert PNG to Excel.

How to Convert SQL to JAVA

1. Click inside drop area or drag & drop your file.
2. Wait until SQL to JAVA file is uploaded.
3. Select output format from dropdown menu.
4. Click on Convert button to start SQL to JAVA conversion.
5. Download or share resulted file.

FAQ

Q: How to convert SQL to JAVA file?

A: Upload you file by drag and drop it to the upload zone with label «Click or drop your files here» or click on it to select file using file explorer. After that select destination format in which you want to convert your file and click Convert button.

Q: Can I extract tables from images (PNG) and export them to Excel files?

A: Yes you can. Conholdate Image to Excel conversion will parse image files using OCR feature and extract text and tables data. Extracted data can be saved into various formats, such as Excel, OpenOffice and more.

Q: How many files can be converted at a time?

A: You can convert 1 file at a time.

Q: What is the maximum allowed file size?

A: Maximum allowed file size to upload and convert is 20 Mb.

Q: What are the ways to get my conversion results?

A: At the end of the conversion process, you will get a download link. You can download the results immediately or send the link to your email.

Q: How multi page document is converted to image?

A: Each page of such a document will be saved as a separate image. After conversion process is finished you will get a package of such images.

More Apps

Источник

Java online compiler

Write, Run & Share Java code online using OneCompiler’s Java online compiler for free. It’s one of the robust, feature-rich online compilers for Java language, running the Java LTS version 17. Getting started with the OneCompiler’s Java editor is easy and fast. The editor shows sample boilerplate code when you choose language as Java and start coding.

Taking inputs (stdin)

OneCompiler’s Java online editor supports stdin and users can give inputs to the programs using the STDIN textbox under the I/O tab. Using Scanner class in Java program, you can read the inputs. Following is a sample program that shows reading STDIN ( A string in this case ).

import java.util.Scanner; class Input < public static void main(String[] args) < Scanner input = new Scanner(System.in); System.out.println("Enter your name: "); String inp = input.next(); System.out.println("Hello, " + inp); >>

Adding dependencies

OneCompiler supports Gradle for dependency management. Users can add dependencies in the build.gradle file and use them in their programs. When you add the dependencies for the first time, the first run might be a little slow as we download the dependencies, but the subsequent runs will be faster. Following sample Gradle configuration shows how to add dependencies

apply plugin:'application' mainClassName = 'HelloWorld' run < standardInput = System.in >sourceSets < main < java < srcDir './' >> > repositories < jcenter() >dependencies < // add dependencies here as below implementation group: 'org.apache.commons', name: 'commons-lang3', version: '3.9' >

About Java

Java is a very popular general-purpose programming language, it is class-based and object-oriented. Java was developed by James Gosling at Sun Microsystems ( later acquired by Oracle) the initial release of Java was in 1995. Java 17 is the latest long-term supported version (LTS). As of today, Java is the world’s number one server programming language with a 12 million developer community, 5 million students studying worldwide and it’s #1 choice for the cloud development.

Syntax help

Variables

short x = 999; // -32768 to 32767 int x = 99999; // -2147483648 to 2147483647 long x = 99999999999L; // -9223372036854775808 to 9223372036854775807 float x = 1.2; double x = 99.99d; byte x = 99; // -128 to 127 char x = 'A'; boolean x = true;

Loops

1. If Else:

When ever you want to perform a set of operations based on a condition If-Else is used.

if(conditional-expression) < // code >else < // code >

2. Switch:

Switch is an alternative to If-Else-If ladder and to select one among many blocks of code.

3. For:

For loop is used to iterate a set of statements based on a condition. Usually for loop is preferred when number of iterations is known in advance.

for(Initialization; Condition; Increment/decrement) < //code >

4. While:

While is also used to iterate a set of statements based on a condition. Usually while is preferred when number of iterations are not known in advance.

5. Do-While:

Do-while is also used to iterate a set of statements based on a condition. It is mostly used when you need to execute the statements atleast once.

Classes and Objects

Class is the blueprint of an object, which is also referred as user-defined data type with variables and functions. Object is a basic unit in OOP, and is an instance of the class.

How to create a Class:

class keyword is required to create a class.

Example:

How to create a Object:

How to define methods in a class:

public class Greeting < static void hello() < System.out.println("Hello.. Happy learning!"); >public static void main(String[] args) < hello(); >>

Collections

Collection is a group of objects which can be represented as a single unit. Collections are introduced to bring a unified common interface to all the objects.

Collection Framework was introduced since JDK 1.2 which is used to represent and manage Collections and it contains:

This framework also defines map interfaces and several classes in addition to Collections.

Advantages:

• High performance
• Reduces developer’s effort
• Unified architecture which has common methods for all objects.

Источник

Online JAVA to SQL Conversion

Conholdate JAVA to SQL Conversion is cross platform and cross browser conversion app that allow you to convert JAVA to SQL in any modern browser (Chrome, Safari, Firefox, Opera, Tor, etc) and on any OS (Windows, Unix and MacOS) despite your PC specifications. Converted JAVA to SQL will maintain original document structure, content and styles. JAVA to SQL Convertor app is built on top of high quality document conversion engine which provides outstanding conversion results and performance, our goal is to offer secure and best conversion experience to our users. Conholdate.Conversion app offers an OCR feature that allows you to parse image files and export data into Excel documents, for example convert PNG to Excel.

How to Convert JAVA to SQL

1. Click inside drop area or drag & drop your file.
2. Wait until JAVA to SQL file is uploaded.
3. Select output format from dropdown menu.
4. Click on Convert button to start JAVA to SQL conversion.
5. Download or share resulted file.

FAQ

Q: How to convert JAVA to SQL file?

A: Upload you file by drag and drop it to the upload zone with label «Click or drop your files here» or click on it to select file using file explorer. After that select destination format in which you want to convert your file and click Convert button.

Q: Can I extract tables from images (PNG) and export them to Excel files?

A: Yes you can. Conholdate Image to Excel conversion will parse image files using OCR feature and extract text and tables data. Extracted data can be saved into various formats, such as Excel, OpenOffice and more.

Q: How many files can be converted at a time?

A: You can convert 1 file at a time.

Q: What is the maximum allowed file size?

A: Maximum allowed file size to upload and convert is 20 Mb.

Q: What are the ways to get my conversion results?

A: At the end of the conversion process, you will get a download link. You can download the results immediately or send the link to your email.

Q: How multi page document is converted to image?

A: Each page of such a document will be saved as a separate image. After conversion process is finished you will get a package of such images.

More Apps

Источник