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1: CRUD
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2: Insert Statement
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3: Auto Increment
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4: Manual Entry
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5: Count
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6: WHERE Clause
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7: Finding NULL Values
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8: DELETE
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9: Danger of Deleting Data
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10: Update Query in SQL
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11: Object-Relational Mapping (ORMs)
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12: Query Practice – User Count
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13: Query Practice – Country Codes
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CRUD is an acronym that describes the four basic ways applications work with stored data: CREATE, READ, UPDATE, and DELETE. These four operations are the bread and butter of nearly every database and map directly to a lot of real-world application functionality:
CREATE: sign up a new user, post a commentREAD: load a user's profile, view a list of productsUPDATE: edit a comment, change your passwordDELETE: remove a post, close an accountWe've created a table for you called crud, it's a toy table we're using for interview practice at CashPal.
Determine which SQL command can be used for a READ operation and use it to read all the fields in all the records in the crud table!
Reading data is just another way of saying retrieving data.