Judith-Data-Processing-Hacks articles - 212 total
Query the Records Closest to the Specified Time Each Day — From SQL to SPL #43
Problem Description & Analysis: A table in Oracle database has a column of datetime...
Generate Event Sequence Numbers within a Specified Time Interval — From SQL to SPL #42
Problem Description & Analysis: A certain table in the MS SQL database has three...
Row to Column Conversion Involving Uncertain Columns — From SQL to SPL #41
Problem Description & Analysis: The query results of the Postgresql database return 6...
Search for Records Containing a Specified String Group in Multi Fields — From SQL to SPL #40
Problem Description & Analysis: A table in an Oracle database has multiple string...
Add Records that Meet the Criteria before Each Group after Grouping — From SQL to SPL #39
Problem Description & Analysis: In a certain view of the PostgreSQL database, the...
Count Distinct within Intervals in Order — From SQL to SPL #38
Problem Description & Analysis: The Teradata database table has three fields: date,...
Conditional Grouping — From SQL to SPL #37
Problem Description & Analysis: A certain database table has multiple fields that can...
Change Duplicate Contents to NULL — From SQL to SPL #36
Problem Description & Analysis: The first two columns of a certain database table have...
Get the Initial Date Using the Total — From SQL to SPL #35
Problem Description & Analysis: A certain database table records the planned inbound...
Getting the Available Ranges from Two Tables — From SQL to SPL #34
Problem Description & Analysis: There are two tables in a certain database. The...
Total under Recursive Relationship — From SQL to SPL #33
Problem Description & Analysis: A certain database has a ticket table and a work hour...
Converting JSON Data to Tabular in Snowflake — From SQL to SPL #32
Problem Description & Analysis: The Snowflake database has a multi-layered JSON...
Statistics by Time Window — From SQL to SPL #31
Problem description & analysis: The Time field of a certain database table is time,...
Segmented Accumulation by Condition — From SQL to SPL #30
Problem description & analysis: The ID field of a certain database table is used for...
Generate Calculated Columns Based on Continuous Values — From SQL to SPL #29
Problem description & analysis: The field n of a certain database table is used for...
Find Consecutive Alphabetical Characters in String — From SQL to SPL #28
Problem description & analysis: The field of a certain database table is...
Aggregate according to Time Interval — From SQL to SPL #27
Problem description & analysis: A certain database table stores time-series data, with...
Create Columns from Distinct Values of a Column — From SQL to SPL #26
Problem description & analysis: A certain database table records the monthly sales of...
Substring from a Column of Strings — From SQL to SPL #25
Problem description & analysis: The database table tbl has a string field...
Fetch Values from Previous Non-Null Value Rows — From SQL to SPL #24
Problem description & analysis: The database table organisation_user_link stores the...
Count Date Ranges per Year — From SQL to SPL #23
Problem description & analysis: The x field of the database table example is ID, and...
Summarize Row Counts by Dynamic Columns into JSON — From SQL to SPL #22
Problem description & analysis: Each column of database table tempdata can be viewed...
Deduplicate between an Uncertain Number of Columns — From SQL to SPL #21
Problem description & analysis: A certain database table has multiple fields, each...
Find the Closest Date Match for Each Record from Two Tables — From SQL to SPL #20
Problem description & analysis: SQL Server has two tables, Table1： Table2： Task:...
Find the Superset from the Relationship Table — From SQL to SPL #19
Problem description & analysis: The MySQL database has two tables: bag table and bag...
Get the Records after and before the Searched One — From SQL to SPL #18
Problem description & analysis: The ProductionLine_Number in a certain table of the...
Number Non-Null Values in Order within the Group — From SQL to SPL #17
Problem description & analysis: After sorting a table in the Oracle database according...
Getting Values from Multiple Format Strings to Multiple Records — From SQL to SPL #16
Problem description & analysis: There are four strings separated into two parts by...
Calculate all the year/months included in the year/month interval — From SQL to SPL #15
Problem description & analysis: The second and third fields of a certain database...
Calculate the Number of Intersections between Adjacent Subsets after Grouping — From SQL to SPL #14
Problem description & analysis: A certain database table records the execution status...