How do you insert new rows into a table in PostgreSQL?
Question
How do you insert new rows into a table in PostgreSQL?
Solution
To insert new rows into a table in PostgreSQL, you can follow these steps:
- Connect to your PostgreSQL database using a client tool or command-line interface.
- Identify the table into which you want to insert the new rows.
- Determine the columns in the table that you want to populate with data.
- Write an SQL INSERT statement to specify the table name and the column names for the new rows.
- Provide the values for each column in the new rows.
- Execute the INSERT statement to add the new rows to the table.
Here is an example of how you can insert new rows into a table called "employees" with columns "id", "name", and "salary":
INSERT INTO employees (id, name, salary)
VALUES (1, 'John Doe', 50000),
(2, 'Jane Smith', 60000),
(3, 'Bob Johnson', 55000);
In this example, we are inserting three new rows into the "employees" table. Each row specifies the values for the "id", "name", and "salary" columns.
After executing the INSERT statement, the new rows will be added to the "employees" table in PostgreSQL.
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Consider the below orders table:Column NameDatatypeConstraintorder_idNumberPKOrder_dateDate Order_modevarchar Customer_idNumber Order_totalNumber(8,2) There is only one customer with the CUST_LAST_NAME column having value Roberts. Which INSERT statement should be used to add a row into the ORDERS table for the customer whose CUST_LAST_NAME is Roberts and CREDIT_LIMIT is 600?Select one:a.INSERT INTO orders ( order_id ,order _date,order_mode , (SELECT customer_id FROM customersWHERE cust_last_name ='Roberts' ANDcredit_limit =600) , order _total )VALUES (1,'10-mar-2007','direct' ,& &customer_id,1000);b.INSERT INTO( SELECT o.order_id,o.order,o.order_mode,c.customer_id,o.order_totalFROM orders o, customers c WHERE o.customer_id = c.customer_id AND c.cust_last_name='Roberts' and c.credit_limit =600)VALUES (1,'10-mar-2007','direct' ,& &customer_id,1000);FROM customersWHERE cust_last_name ='Roberts' ANDcredit_limit =600) ,1000 );c.INSERT INTO orders ( order_id ,order _date,order_mode , (SELECT customer_id FROM customersWHERE cust_last_name ='Roberts' ANDcredit_limit =600) , order _total )VALUES (1,'10-mar-2007','direct' ,& customer_id,1000);d.INSERT INTO orders VALUES( 1,'10-mar-2007','direct', (SELECT customer_id FROMcustomers WHERE cust_last_name ='Roberts' ANDcredit_limit =600) ,1000 );
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