insert query in oracle with code examples

Oracle is one of the most widely used relational database management systems around the world. It is widely used in the corporate sector, research labs, and businesses worldwide. Oracle provides a comprehensive set of features and tools that are designed to help businesses manage their data in an efficient manner. One of these features is the "Insert Query" functionality, which allows you to insert new data into a table.

In this article, we will discuss the "Insert Query" functionality in Oracle with detailed examples. We will cover the basics of the Insert Query syntax, the different types of Insert Queries, and provide code examples to help you understand how to use the Insert Query function to insert new data into your tables.

Basics of the Insert Query in Oracle

In Oracle, the Insert Query is used to add new data to a table. The basic syntax of the Insert Query is as follows:

• INSERT INTO table_name (column1, column2, …, columnN) VALUES (value1, value2, …, valueN);

In this syntax, "table_name" is the name of the table you want to insert data into. "column1, column2, …, columnN" refer to the columns in the table that you want to insert data into. "value1, value2, …, valueN" refers to the actual data values that you want to insert into the corresponding columns.

Example of Insert Query in Oracle

Suppose you have a table named "Employees" with columns "EmployeeID", "FirstName", "LastName", "Email", and "Phone". Now, if you want to add a new employee record to the table, you can use the following Insert Query:

• INSERT INTO Employees (EmployeeID, FirstName, LastName, Email, Phone) VALUES (101, 'John', 'Doe', 'john.doe@example.com', '123-456-7890');

In this example, we are adding a new employee record to the Employees table. The new employee has an EmployeeID of 101, a first name of "John", a last name of "Doe", an email address of "john.doe@example.com", and a phone number of "123-456-7890".

Types of Insert Queries in Oracle

Oracle provides three types of Insert Queries:

1. Simple Insert Query

2. The Insert All Statement

3. Insert with Subquery

4. Simple Insert Query

The Simple Insert Query is the most common type of Insert Query that is used in Oracle. This query is used to insert a single row into a table.

Syntax:

• INSERT INTO table_name (column1, column2, …, columnN) VALUES (value1, value2, …, valueN);

Example:

• INSERT INTO Employees (EmployeeID, FirstName, LastName, Email, Phone) VALUES (102, 'Jane', 'Doe', 'jane.doe@example.com', '987-654-3210');

This query will insert a single row of data into the "Employees" table with the values specified in the VALUES clause.

2. The Insert All Statement

The Insert All Statement is a statement that allows you to insert multiple rows into a table using a single Insert Query. This syntax is very useful when you want to insert a large amount of data into a table.

Syntax:

• INSERT ALL INTO table_name (column1, column2, …, columnN) VALUES (value1, value2, …, valueN) INTO table_name (column1, column2, …, columnN) VALUES (value1, value2, …, valueN) … INTO table_name (column1, column2, …, columnN) VALUES (value1, value2, …, valueN) SELECT * FROM dual;

Example:

• INSERT ALL INTO Employees (EmployeeID, FirstName, LastName, Email, Phone) VALUES (103, 'Mike', 'Johnson', 'mike.johnson@example.com', '111-222-3333') INTO Employees (EmployeeID, FirstName, LastName, Email, Phone) VALUES (104, 'Sarah', 'Smith', 'sarah.smith@example.com', '444-555-6666') INTO Employees (EmployeeID, FirstName, LastName, Email, Phone) VALUES (105, 'Mark', 'Davis', 'mark.davis@example.com', '777-888-9999') SELECT * FROM dual;

In this example, we are inserting three rows of data into the "Employees" table using a single Insert Query.

3. Insert with Subquery

The Insert with Subquery statement is a type of Insert Query that allows you to insert data into a table using the results of a subquery.

Syntax:

• INSERT INTO table_name (column1, column2, …, columnN) SELECT subquery FROM table_name;

Example:

• INSERT INTO Employees (EmployeeID, FirstName, LastName, Email, Phone) SELECT EmployeeID, FirstName, LastName, Email, Phone FROM NewEmployees;

In this example, we are inserting data into the "Employees" table using a subquery. The subquery pulls data from the "NewEmployees" table and inserts it into the "Employees" table.

Conclusion

In conclusion, the Insert Query is an essential feature of Oracle that allows businesses to insert new data into their tables. It is a straightforward and easy-to-use function that helps businesses manage their data efficiently. In this article, we discussed the basics of the Insert Query syntax and the different types of Insert Queries in Oracle. We also provided code examples to help you understand how to use the Insert Query function effectively.

let's dive a bit deeper into the Insert Query in Oracle and the different types of Insert Queries.

First, it's important to note that when using the Insert Query in Oracle, you must have write permission to the table you are trying to insert data into. If you do not have the appropriate permissions, you will receive an error message.

Now, let's take a closer look at the different types of Insert Queries in Oracle.

1. Simple Insert Query

As mentioned before, the Simple Insert Query is the most common type of Insert Query used in Oracle. It is used to insert a single row of data into a table.

In the syntax, you specify the column names you want to insert data into and the values you want to add to the table. It's important to provide the values in the correct order, according to the column names.

Here's an example:

INSERT INTO employees (employee_id, first_name, last_name, salary)
VALUES (101, 'John', 'Doe', 50000);

This query will insert a new row into the "employees" table with data for the columns "employee_id", "first_name", "last_name", and "salary".

2. The Insert All Statement

The Insert All Statement is used to insert multiple rows of data into a table using a single Insert Query. It's commonly used when you need to add a large amount of data to a table.

Here's an example:

INSERT ALL
INTO employees (employee_id, first_name, last_name, salary)
VALUES (102, 'Jane', 'Doe', 60000)
INTO employees (employee_id, first_name, last_name, salary)
VALUES (103, 'Mike', 'Johnson', 55000)
INTO employees (employee_id, first_name, last_name, salary)
VALUES (104, 'Sarah', 'Smith', 65000)
SELECT * FROM dual;

In this example, we're inserting three new rows into the "employees" table. We start with the "INSERT ALL" statement, then specify the columns we want to insert data into and the values we want to add. We repeat this for each row we want to add, then end with a subquery that selects all the inserted rows.

3. Insert with Subquery

The Insert with Subquery statement is used to insert data into a table using a select query. This is useful if you want to insert data from one table into another table or if you want to insert data based on specific criteria.

Here's an example:

INSERT INTO employees (employee_id, first_name, last_name, salary)
SELECT employee_id, first_name, last_name, salary
FROM temp_employees
WHERE salary > 50000;

In this example, we're inserting data from the "temp_employees" table into the "employees" table. We're only inserting data where the "salary" column is greater than 50,000. The columns in the select statement must match the columns in the Insert statement.

In conclusion, the Insert Query in Oracle is a useful tool for inserting data into a table. The Simple Insert Query, Insert All Statement, and Insert with Subquery are three different types of Insert Queries you can use to insert data into a table. Each one has its own unique syntax and use cases, so it's important to understand how and when to use each type.

Popular questions

1. What is the purpose of the Insert Query in Oracle?
   Answer: The Insert Query in Oracle is used to add new data to a table.

2. What is the syntax of a Simple Insert Query in Oracle?
   Answer: The basic syntax of a Simple Insert Query in Oracle is:

INSERT INTO table_name (column1, column2, ..., columnN) VALUES (value1, value2, ..., valueN);

3. How is the Insert All Statement used in Oracle?
   Answer: The Insert All Statement is used to insert multiple rows of data into a table using a single Insert Query.

4. What is the syntax of the Insert with Subquery statement in Oracle?
   Answer: The syntax of the Insert with Subquery statement in Oracle is:

INSERT INTO table_name (column1, column2, ..., columnN) SELECT subquery FROM table_name;

5. Can you give an example of using the Insert Query with Subquery in Oracle?
   Answer: Yes, here's an example using the Employees and Departments tables:

INSERT INTO employees (employee_id, first_name, last_name, department_id)
SELECT employee_id, first_name, last_name, department_id
FROM departments
WHERE department_name = 'Sales';

In this example, we're inserting data from the "departments" table into the "employees" table. We're selecting data only where the department_name is "Sales". The columns in the select statement must match the columns in the Insert statement.

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SQL