Practice - Common ALTER TABLE operations
Practice Questions
Test your understanding with targeted questions
What command is used to add a new column to an existing table?
💡 Hint: Remember the purpose of A in ADD relates to enhancement.
What does the DROP COLUMN command do?
💡 Hint: Consider what happens if we choose to get rid of excess baggage.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What SQL command is used to add a new column?
💡 Hint: This command alters the existing structures, remember the first part it begins with.
True or False: Dropping a column from a table is reversible.
💡 Hint: Think about actions that can't be undone.
2 more questions available
Challenge Problems
Push your limits with advanced challenges
You are responsible for maintaining a database for a school. The school wants to gather student emergency contact information. Write an SQL command to add two new columns: 'ContactName' and 'ContactPhone' to the 'Students' table.
💡 Hint: Consider the requirements for storing names and phone numbers.
A table named 'Products' has a 'Price' column defined as DECIMAL(10,2). The pricing strategy has changed, and now you need to allow prices between 0.00 and 1,000.00. Write an SQL command to modify the 'Price' column appropriately.
💡 Hint: Understand that modifying usually doesn't require a new type but simply reaffirming the range.
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Reference links
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