We have 3 tables Orders table (ORDER_ID, CUSTOMER_ID, ORDER_DATE) Detail table (ORDER_ID, PRODUCT_ID, PRICE, UNITS) Customers table (CUSTOMER_ID, SIGNUP_DATE, COUNTRY) Data request: can you write […]

data: code A1 A2 A11 A22 A111 A222 A3333 A4444   We want to select a data set as follows. A1 A2 A11 A22 A111 […]

Table name is dogs. The table includes columns 1. name varchar 2. breed varchar 3. weight float 4. color varchar 5. age int The dogs […]

I found there are lots of resource for SQL interview questions. It can help you on refreshing your knowledge of sql. Go through the below […]

When we get message similar as below, usually we did not indicate a table for that column. But  sometimes it means you have written the […]

Add days, weeks, month, quarter, year to a date: use positive number #minus days, weeks, month, quarter, year from a date: use negative number Example […]