INSERT data into table in PostgreSQL

The PostgreSQL INSERT INTO statement assures you to include a new row in the table. A row or multiple rows can be inserted at the time of the query results.

Syntax to use of INSERT INTO keyword in PostgreSQL

The original sentence of the INSERT INTO statement is as follows:

INSERT INTO TABLE_NAME (column1, column2, column3,...columnN)
VALUES (value1, value2, value3,...valueN);

Here, column 1, column 2, columns are columns in the table in which you want to insert the data.
The names of the target column can be listed in any order. The value given by the price segment or the query is linked to the left or right from a clear or built-in column list.
If you are adding values ​​to all the columns in the table, you may not need to specify the column (s) in the SQL query. However, undo doubt that the order of values ​​is in the same table in the table. The SQL INSERT INTO syntax will be as follows-

INSERT INTO TABLE_NAME VALUES (value1,value2,value3,...valueN);

Output explanation when Inserted records in the table -PostgreSQL

The following table explains the output message and their purpose-
Output message and representation
INSERT oid 1
The message was returned when only one row was inserted. OID is the statistical OID of the inserted row.
If several rows were entered, the message came back. # Contains the number of rows.


Let us make the Employee table in myDB like this –
   EmpName                TEXT    NOT NULL,
   Age                    INT     NOT NULL,
   Address                CHAR(50),
   Salary                 REAL,
   DOJ                          DATE

In the following instance, there is a line in the Employee's table –
INSERT INTO Employee (ID, EmpName, Age, Address, Salary, DOJ) VALUES (1, 'DK', 25, 'Noida', 20000.00,'2019-06-15');

The following instance is to include a line; The salary column has been left here and therefore its default value will be –
INSERT INTO Employee (ID, EmpName, Age, Address, DOJ) VALUES (2, 'Anil', 25, 'Delhi', '2018-12-13');

Instead of specifying the following example values, use the DOJ column for the DEFAULT clause –
INSERT INTO Employee (ID, EmpName, Age, Address, Salary, DOJ) VALUES (3, 'Ria', 23, 'Gkp', 25000.00, DEFAULT );

The following illustrations include several lines using multi-line syntax –
INSERT INTO Employee (ID, EmpName, Age, Address, Salary, DOJ) VALUES ('Sia',22, ‘Noida’ 65000.00, '2018-12-13'), (5, 'Naina', 27, 'Delhi', 85000.00, '2018-06-15');

PostgreSQL-Query: Sort result set by specific field values using ORDER BY Clause

Problem: Suppose we have a book_inventory table which has some columns such as id, isbn, title, author, publisher, publish_date, etc.. whe...