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Unique index on 3 columns where NULL conflicts with all other values in one column

score 73 · Answer 1 · 2024-03-23T00:10:15.273000

73

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Unique index on 3 columns where NULL conflicts with all other values in one column

Published on 23 March 2024 at 00:10

score 44 · Answer 2 · 2024-02-21T11:36:57.637000

44

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score 197 · Answer 3 · 2023-11-21T21:12:09.523000

197

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score 123 · Answer 4 · 2023-08-07T13:37:22.603000

123

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score 159 · Answer 6 · 2022-10-15T04:55:02.353000

159

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score 213 · Answer 7 · 2022-03-29T14:04:32.777000

213

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score 358 · Answer 8 · 2021-09-28T09:56:18.967000

358

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score 44 · Answer 9 · 2021-09-18T16:49:06.853000

44

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score 415 · Answer 10 · 2021-07-12T13:46:09.987000

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score 1.2k · Answer 11 · 2021-05-10T01:11:44.823000

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score 305 · Answer 12 · 2021-04-13T18:48:10.963000

305

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score 616 · Answer 13 · 2021-03-19T00:21:27.173000

616

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score 117 · Answer 14 · 2021-02-18T18:21:59.967000

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score 256 · Answer 15 · 2021-01-28T16:07:39.493000

256

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score 51 · Answer 16 · 2021-01-22T10:31:29.587000

51

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score 759 · Answer 17 · 2020-12-08T17:39:58.147000

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score 180 · Answer 18 · 2020-11-06T08:55:18.963000

180

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score 2.3k · Answer 19 · 2020-10-24T00:26:05.070000

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772

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List Question

Unique index on 3 columns where NULL conflicts with all other values in one column

calculate count from 4 sources, joins and exclusions

INSERT or UPDATE based on changing timestamp

Logical operators in a Postgres EXCLUDE constraint

How to exclude some fields of subclasses from Apache Commons-> HashCodeBuilder.reflectionHashCode

ERROR: could not create exclusion constraint

How to use a postgres exclude constraint to enforce adjacency

how to handle updates on a table with exclusion constraint?

Exclude local csv from SQL query in Workbench

Constraint on a group of rows

Conditional UNIQUE constraint on table?

Postgres exclusion constraint on insert/update

Django Postgres Exclusion Constraint with ManyToManyField

How to impose this exclusion constraint?

Constraint for ensuring no overlaps, but only under certain circumstances, and with conflict resolution?

Create a new column based on conditional inclusion fulfilling conditions in R

Postgres trigger to check date overlap with already existing records

How to get unique values from 2 columns in PostgreSQL

What is exclusion constraint in PostgreSQL? What is the according term (and sample SQL script) in Microsoft SQL Server?

PostgreSQL exclusion constraints in a bitemporal setting?

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