add sql query code example

Example 1: sql insert query

--sql insert quest example
INSERT INTO table_name (column1, column2, column3, ...)
VALUES (value1, value2, value3, ...);

Example 2: sql insert

-- Note: This is specifically for SQL - Oracle
-- ---------------------------------------------------------------
-- OPTION 1: Insert specific values (other values will be null)

-- syntax 
INSERT INTO <TABLE_NAME> (<column1>,<column2>,<column3>,...) 
VALUES (<value1>,<value2>,<value3>,...);

-- example
INSERT INTO SALES (SALE_ID,ITEM_ID,QUANTITY,AMOUNT)
VALUES (631,13,4,59.99);
-- ---------------------------------------------------------------
-- OPTION 2: Insert a value for every field

-- syntax
INSERT INTO <TABLE_NAME> VALUES (<value1>,<value2>,...,<valueN>);

-- example (SALES table only consists of 4 columns)
INSERT INTO SALES VALUES (631,13,4,59.99);
-- ---------------------------------------------------------------

Example 3: sql add

Adds a new column to an existing table.
Example: Adds a new column named ‘email_address’ to a table named
‘users’.
ALTER TABLE users
ADD email_address varchar(255);