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jinxing • Application • 247 View • 2024-09-02 16:10:39
Process a large csv file with parallel processing
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jinxing • Application • 174 View • 2024-08-30 11:25:06
Split values of a field in a database table and transform it to new fields
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jinxing • Application • 201 View • 2024-08-28 14:34:41
Get the whole group where at least one member meets the specified condition
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jinxing • Application • 264 View • 2024-08-23 15:29:46
Java, perform COUNT on each group of a large csv file
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jinxing • Application • 190 View • 2024-08-21 15:00:30
Group and Summarize data, and align to the specified sequence
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jinxing • Application • 215 View • 2024-08-20 15:23:32
SQL, mark continuous rows with sequence numbers
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jinxing • Application • 224 View • 2024-08-19 17:39:02
SQL, compute cumulative sums according to the termination condition
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jinxing • Application • 205 View • 2024-08-16 15:26:09
SQL, concatenate multiple rows of strings and remove duplicates
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jinxing • Application • 200 View • 2024-08-15 15:54:28
SQL, output associated records having many-to-many relationship row by row
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jinxing • Application • 257 View • 2024-08-07 18:08:07
SQL, split values of two columns respectively and count members of their intersection
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jinxing • Application • 354 View • 2024-08-05 17:30:22
Get duplicate records from a csv file and sort them
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jinxing • Application • 243 View • 2024-08-02 14:02:51
Retrieve multiple columns from a csv file to generate a new file
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jinxing • Application • 224 View • 2024-08-01 15:37:08
Clear duplicate lines and lines having missing values from a csv file
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jinxing • Application • 249 View • 2024-07-31 18:28:00
Merge multiple files, remove duplicates and sort the result
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jinxing • Application • 295 View • 2024-07-26 08:32:05
Retrieve a specified column from a csv file and concatenate its values as a string