关于“Loading Taxi Data into Google Cloud SQL 2.5”的评价

It seems extraordinary to deal with table defs and similar DDL on a naked CLI. Probably more people would use a SQL client. Task 2 - #13 and Task 4 #2: Parentheses around the DISTINCT columns are unnecessary and perhaps misleading in so far as they may create the impression of a function (DISTINCT is not a function). Given: select distinct(pickup_location_id) from trips; Better: SELECT DISTINCT pickup_location_id FROM trips; Even better: SELECT COUNT(DISTINCT pickup_location_id) AS distinct_ids FROM trips; (Note that AS is optional - it's helpful for people who may be new to SQL)

Zachariah V. · 评论over 3 years之前

Ayushee B. · 评论over 3 years之前

Tim J. · 评论over 3 years之前

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Amin B. · 评论over 3 years之前

Manish C. · 评论over 3 years之前

Venkatesh T. · 评论over 3 years之前

Hernán P. · 评论over 3 years之前

Joseph K. · 评论over 3 years之前

Rajasubahini R. · 评论over 3 years之前

Dayana R. · 评论over 3 years之前

Himasha J. · 评论over 3 years之前

David K. · 评论over 3 years之前

Zu wenig Zeit (um alle Inhalte die für einen Tag eingeplant sind zu schaffen, ist man effektiv auf 30 Minuten eingeschränkt). Das Lab reduziert sich auf Copy & Paste Aktionen, ohne dass man genaueres Verständnis erlangt, was und warum ausgerechnet so, man tut.

Martin S. · 评论over 3 years之前

Rajesh Kumar B. · 评论over 3 years之前

Gino S. · 评论over 3 years之前

Alper T. · 评论over 3 years之前

Thomas G. · 评论over 3 years之前

Nice Lab, every thing worked out and matched the description

Gerald K. · 评论over 3 years之前

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Ansgar K. · 评论over 3 years之前

Markus J. · 评论over 3 years之前

Bernd S. · 评论over 3 years之前

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Muralitharan K. · 评论over 3 years之前