hsqldb.zip file from the download page to your local computer..zip file.hsqldb.zip file. Open a command prompt, change to the directory where the file hsqldb.zip is located, and type: jar -xf hsqldb.zip.index.html’ file. java -cp path/to/hsqldb.jar org.hsqldb.server.Server --database.0 file:mydatabase --dbname.0 mydatabase?path/to/hsqldb.jar with the actual path to the HSQLDB JAR file on your system. Replace mydatabase with the name of your database.Ctrl + C in the terminal window where the server is running. This will send a termination signal to the server process, causing it to shut down gracefully.jdbc:hsqldb:hsql://localhost/mydatabase (replace mydatabase with your actual database name), and execute the SQL command SHUTDOWN;. This will instruct the server to shut down after completing any pending transactions. --port option. For example, you can start the server on a different port like 1234 by running the following command:java -cp path/to/hsqldb.jar org.hsqldb.server.Server --database.0 file:mydatabase --dbname.0 mydatabase --port 1234?path/to/hsqldb.jar with the actual path to the HSQLDB JAR file, and replace mydatabase with the name of your database. The --port option specifies the port number to use for client-server communication.INSERT INTO statement followed by the name of the table and the values you want to insert.UPDATE statement followed by the name of the table and the values you want to update.DELETE FROM statement followed by the name of the table and any conditions that should be met to delete the data. CREATE DATABASE <database_name>;?<database_name> with the desired name for your new database.CREATE TABLE <table_name> (
column1 datatype1 [constraint],
column2 datatype2 [constraint],
...
[table_constraint]
);?<table_name> with the desired name for your new table. Define the columns of the table by specifying their names and data types. Optionally, you can add constraints to enforce data integrity rules on the table columns. Finally, you can include table-level constraints to enforce rules that involve multiple columns.CREATE TABLE Employee (
employee_id INT PRIMARY KEY,
first_name VARCHAR(50),
last_name VARCHAR(50),
email VARCHAR(100) UNIQUE,
hire_date DATE,
salary DECIMAL(10, 2),
department_id INT,
CONSTRAINT fk_department_id FOREIGN KEY (department_id) REFERENCES Department(department_id)
);?Employee with columns for employee ID, first name, last name, email, hire date, salary, and department ID. We've added primary and foreign key constraints to enforce data integrity rules.CREATE TABLE statement, the new table will be created in the database, and you can start inserting data into it, querying it, or performing other operations as needed. HSQLDB table by including the PRIMARY KEY keyword followed by the column name(s) in parentheses after the column definition. For example:CREATE TABLE table_name (
column1 INT PRIMARY KEY,
column2 VARCHAR(50) NOT NULL,
…
);?CREATE PROCEDURE procedure_name ([IN | OUT | INOUT] parameter_name data_type, …)
[MODIFIES SQL DATA]
[NOT DETERMINISTIC]
[LANGUAGE JAVA | SQL]
[EXTERNAL NAME ‘fully.qualified.class.name.methodName’];?SELECT column1, column2, ...
FROM table_name;?column1, column2, etc., with the names of the columns you want to retrieve data from, and replace table_name with the name of the table you want to retrieve data from.SELECT *
FROM table_name;?SELECT employee_id, first_name, last_name
FROM Employee;?employee_id, first_name, and last_name columns from the Employee table.WHERE clause :SELECT *
FROM Employee
WHERE department_id = 1;?Employee table where the department_id is equal to 1.SELECT statement, the database will return the result set containing the requested data based on your query. You can then process the result set in your application or SQL client as needed. HSQLDB table by including the FOREIGN KEY keyword followed by the column name(s) in parentheses and the referenced table and column name(s) in parentheses after the column definition. For example:CREATE TABLE table_name (
column1 INT PRIMARY KEY,
column2 INT,
…
FOREIGN KEY (column2) REFERENCES referenced_table (referenced_column)
);?CREATE INDEX SQL statement. Indexes help improve query performance by allowing the database to quickly locate rows based on the values of indexed columns. Here's the basic syntax for creating an index in HSQLDB:CREATE INDEX index_name ON table_name (column1, column2, ...);?index_name with the desired name for your index, table_name with the name of the table you want to create the index on, and column1, column2, etc., with the names of the columns you want to include in the index. You can create indexes on one or more columns, and you can include multiple columns in a single index.CREATE INDEX idx_lastname ON Employee (last_name);?idx_lastname on the last_name column of the Employee table.
You can also create composite indexes on multiple columns to improve the performance of queries that involve those columns. Here's an example of creating a composite index on two columns:CREATE INDEX idx_firstname_lastname ON Employee (first_name, last_name);?idx_firstname_lastname on the first_name and last_name columns of the Employee table.SELECT * FROM INFORMATION_SCHEMA.SYSTEM_PROPERTIES WHERE NAME = ‘version’
ALTER TABLE SQL statement. Here's the general syntax for adding constraints to a table:ALTER TABLE table_name
ADD CONSTRAINT constraint_name constraint_definition;?table_name with the name of the table to which you want to add the constraint, constraint_name with the desired name for the constraint, and constraint_definition with the definition of the constraint.ALTER TABLE Employee
ADD CONSTRAINT pk_employee_id PRIMARY KEY (employee_id);?ALTER TABLE Employee
ADD CONSTRAINT fk_department_id FOREIGN KEY (department_id) REFERENCES Department(department_id);?ALTER TABLE Employee
ADD CONSTRAINT uk_email UNIQUE (email);?ALTER TABLE Employee
ADD CONSTRAINT ck_salary CHECK (salary >= 0);?ALTER TABLE Employee
ALTER COLUMN first_name SET NOT NULL;?CREATE TRIGGER trigger_name
BEFORE|AFTER|INSTEAD OF event_type ON table_name
FOR EACH ROW
[WHEN condition]
[trigger_action]?CREATE TRIGGER update_employee_salary
AFTER UPDATE OF salary ON Employee
FOR EACH ROW
BEGIN ATOMIC
IF NEW.salary > OLD.salary THEN
INSERT INTO SalaryHistory (employee_id, old_salary, new_salary, change_date)
VALUES (NEW.employee_id, OLD.salary, NEW.salary, CURRENT_TIMESTAMP);
END IF;
END;?HSQLDB, you can use the CALL statement followed by the name of the stored procedure and any required parameters. Here's the basic syntax:CALL procedure_name(parameter1, parameter2, ...);?procedure_name with the name of the stored procedure you want to call, and provide any required parameters according to the procedure definition.SELECT statement, similar to querying a table. Here's an example:CALL my_stored_procedure();?my_stored_procedure without any parameters.
If the stored procedure requires parameters, you can provide them as follows:CALL my_stored_procedure('parameter_value');?SELECT * FROM my_stored_procedure();?my_stored_procedure.CREATE PROCEDURE statement in HSQLDB. CREATE FUNCTION calculate_discount(price DOUBLE, discount_rate DOUBLE) RETURNS DOUBLE AS
BEGIN
RETURN price * (1 - discount_rate);
END;
SELECT product_name, calculate_discount(price, 0.1) AS discounted_price
FROM Products;?READ COMMITTED and SERIALIZABLE isolation levels.server.properties or database.properties) or through JDBC connection properties.hsqldb.sqltool.rcfile property to specify the location of the password file (sa.password).hsqldb.auth.ldap.url, hsqldb.auth.ldap.baseDN, hsqldb.auth.ldap.userSearchFilter, etc., to connect to the LDAP server and perform user authentication.CREATE USER to create user accounts and GRANT to assign permissions and roles to users.HSQLDB server with authentication enabled and configured to use the chosen authentication method.hsqldb.properties file in HSQLDB serves as a central configuration file where you can specify various settings and properties related to the operation and behavior of the HSQLDB database engine. Its primary purpose is to allow users to customize and fine-tune the behavior of the database to suit their specific requirements and deployment environment. Some common purposes of the hsqldb.properties file include:hsqldb.properties file in your HSQLDB installation directory. If it doesn't exist, you can create a new file with this name in the directory where you want to store it.hsqldb.properties file according to your logging requirements. Some common logging properties include:server.log=./logs/hsqldb.logserver.trace=trueserver.remote_open=truehsqldb.properties file after configuring the logging properties.server.log property to view the logged information, including server startup messages, SQL statements, and other diagnostic messages.BACKUP DATABASE TO 'backup_file.zip'?backup_file.zip' with the desired file path and name for the backup file.RUNSCRIPT FROM 'backup_file.zip'backup_file.zip' with the path to the backup file created during the backup operation.