Open
Conversation
Logical Model: Tables for employee, customer, book, order, sales, date; added shift table; mapped 1:∞ relationships. Customer Address : Type 1 overwrites address; Type 2 saves history. COALESCE: Replaced NULLs with blank or ‘unit’ while keeping syntax. Window Functions: Numbered visits, reversed numbering, counted product purchases. String Manipulations: Extracted descriptions after hyphens; found numbers in sizes. UNION: Combined best and worst sales days into one query. Cross Join: Calculated vendor sales assuming 5 products for every customer. INSERT/DELETE/UPDATE: Created product_units, added data, deleted old, updated quantity.
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
2 participants
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
What changes are you trying to make? (e.g. Adding or removing code, refactoring existing code, adding reports)
What did you learn from the changes you have made?
Was there another approach you were thinking about making? If so, what approach(es) were you thinking of?
Were there any challenges? If so, what issue(s) did you face? How did you overcome it?
How were these changes tested?
A reference to a related issue in your repository (if applicable)
Checklist