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(See “Table Design 101” in Chapter 3 for more info.)Queries which are based on Structured Query Language (SQL) typically retrieve selected data from tables.
They can also be used to modify or delete existing data, add new data, and create new tables.
Choose the field type that best describes the data you want to store in the field and that works for the type of analysis you need to use the field. Text up to 255 characters long (including spaces and punctuation).
Then populate a list control with that list so users can select a value from this list.
The difference is that in a database, you must define these structures much more precisely.
This is the foundation on which everything else rests.
When the fields are placed in the wrong table, Third Normal Form is broken, and data integrity is not achieved.
Poor relationship design can also stop a database in its tracks.