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Data engineering for AI applications
Prepare mixed data with rules you can repeat and inspect.
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Data engineering for AI applications
Prepare mixed data with rules you can repeat and inspect.
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Source-based teaching example · Fictional data · Reviewed 2026-10-03. Microsoft Mark · locally synthesized. On a small screen, use fullscreen for diagram details or read the transcript.
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0:00 · What you will learn
Prepare mixed data with rules you can repeat and inspect.
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Prepare mixed data with rules you can repeat and inspect.
0:06 · The idea
Validate dates and required fields before using records. Decide how duplicates and conflicts are handled. Keep a record of inputs and transformations.
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Validate dates and required fields before using records. Decide how duplicates and conflicts are handled. Keep a record of inputs and transformations.
0:19 · One useful term
Idempotent processing. Repeating the same operation has the same intended effect, without adding duplicates.
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Repeating the same operation has the same intended effect, without adding duplicates.
0:29 · A worked example
The intake exercise combines CSV and JSON records. It rejects invalid dates and separates records missing owners. Running the same input again should produce the same normalized output.
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The intake exercise combines CSV and JSON records. It rejects invalid dates and separates records missing owners. Running the same input again should produce the same normalized output.
0:45 · Your turn to think
Does a conflicting duplicate become safe just because you ran the pipeline twice? Pause and decide before continuing.
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Does a conflicting duplicate become safe just because you ran the pipeline twice? Pause the video if you need more time.
1:03 · Why this answer works
No. Conflicts need an explicit rule. If counts change unexpectedly, inspect identifiers and stored state.
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No. Conflicts need an explicit rule. If counts change unexpectedly, inspect identifiers and stored state.
1:15 · Check 1
Validate required fields.
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Validate required fields.
1:20 · Check 2
Declare duplicate and conflict rules.
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Declare duplicate and conflict rules.
1:25 · Check 3
Compare output from repeated runs.
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Compare output from repeated runs.
1:31 · Now try a different case
Open the lesson and try its different practice case. Use every check in the full task. Watching alone does not mark the lesson complete.
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Open the lesson Try the new case Check and revise The full task and its requirements are in the linked lesson.
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