Home Search Pricing Get inErrata About

Sign in Sign up

Graph/cluster-48

ClusterConcept

SQL Update-Filter Shape

cluster-48

UPDATE statements get scoped by nested subqueries (often with LIMIT) to control which rows change, but predicate placement and NULL/NOT IN semantics can silently drop or retain rows. The result is incorrect sets when filtering against another table.

Node Details

Public graph metadata

Updated6/24/2026

PageRank0.0004

Connections

41 linked nodes

INSTANCE_OFProblem

I can get the same performance issues with either a select or a delete — they join two tables, and none of the join conditions compares using `=`. Tension: `IS NOT DISTINCT FROM` is not supported by indexes, and `OR` is usually a performance problem anyway. Outcome: the root of your problem are the NULL values.

INSTANCE_OFProblem

When any source table had zero rows, that table was silently absent from the result — A dashboard query unioned several content tables into a CTE then GROUP BY'd the table_name to emit one summary row per table. Tension: one summary row per table.

INSTANCE_OFProblem

this gives me the latest 2 files from the last subfolder — I want to read all files from 2023/1/30/ and 2023/1/31/. Tension: How Can I read all files from the last 2 subfolders? Outcome: I need to find some how the latest 2 subfolders at the deepest level and fetch all files from them.

INSTANCE_OFProblem

How can I write this using jOOQ version 3.15.5 ? — SELECT organisation_id, count((j->>'invoiceId')) AS count, sum((j->>'advanceAmount')::numeric(20,4)) AS sum FROM runs LEFT JOIN jsonb_array_elements(invoices) j on true GROUP BY organisation_id;.

INSTANCE_OFProblem

Selecting a more optimal index for a PostgreSQL query that filters on multiple fields inside a JSONB column

INSTANCE_OFProblem

as long as the `realm_id` has a name which status is neither `closed` nor `denied`, it'll be marked as `active`, otherwise, it's `inactive` — aggregate based on `realm_id` first;. Tension: I've tried to use aggregate and left outer join, but no luck thus far. Outcome: You can use `bool_or()` aggregation function.

INSTANCE_OFProblem

none of the three queries you showed ended up using it — Select * from users where Type = 'SomeType' and First = 'SomeName1' Order by CreatedAt DESC;. Tension: The fact that you're selecting and ordering by `CreatedAt` doesn't mean it's needed as an index key. Outcome: If you simply remove `createdat` from the index, they're happy to use it for a Bitmap Index Scan taking below `5ms`.

INSTANCE_OFProblem

syntax error at or near "ASC" — ORDER BY priority DESC NULLS LAST, CASE WHEN 1 = 1 THEN created_at ASC ELSE created_at DESC END;. Tension: How can I have `CASE` in the second key of the `ORDER BY`? Outcome: This throws an error.

INSTANCE_OFProblem

I want to create a query that allows me to aggregate 'Total' if 'Codes' contains any one of the values in an array. — 'Codes' is a varchar column. Tension: What should be the appropriate query?

INSTANCE_OFProblem

in which the query above is nested. Tension: why is it a must to alias in the second query and not the first ?

INSTANCE_OFProblem

Now I want to keep only the rows where we have multiple times the same ID and Name combination. — using the row_number() functon to identify duplicates, partitioned by ID and Name. Tension: the third, fourth and last row should be removed. Outcome: How can this be done?

INSTANCE_OFProblem

I want to calculate the average score of each row — removing one of the highest and one of the lowest scores. Tension: The following is the method I use. It is very bloated and the execution time is too long. Outcome: So I would like to ask if there is a neat way to achieve my needs?

INSTANCE_OFProblem

The following is the method I use. It is very bloated and the execution time is too long. — especially if there are more score columns(score8, score9...), more `UNION ALL` will be piled up.

INSTANCE_OFProblem

to get the price for each entry in descending order according to price. — If an entry has more than one parent key for 'price'. Tension: If an entry has more than one parent key for 'price', select the larger of the two.

INSTANCE_OFProblem

how to get cumulative count? — In postgresql. Tension: I wanted to get a cumulative count of customers enrolled between 01-01 and 02-01, 01-01 and 03-01, 01-01 and 04-01 etc. Outcome: ideally the output should be like.

INSTANCE_OFProblem

I would like to get something like this: — select all the usernames that end with the suffix in one column, matching the users that have the "dbname_suffix" pattern in their usernames with a second column where I have databases.

INSTANCE_OFProblem

I want to pivot this datasets from rows to columns. — timeseries data. Tension: This means in each row one complete dataset.

INSTANCE_OFProblem

need to check the type of a given object — I'm working on a PostgreSQL database. Tension: Currently, I'm using multiple queries and conditions to determine the object type.

INSTANCE_OFProblem

So far I can get both groups valid and invalid if tomato appears in the set. — I have a set of data that I group by "product_group_id", "group_name" and "class". Tension: I want to check the "name" list and if "tomato" name exists in the set I will add "invalid" value or "valid" to the new "label" column. Outcome: You need to use an aggregated function e.g. `max` to check the tomato and not group by on the `label`.

INSTANCE_OFProblem

ERROR: missing FROM-clause entry for table cte — SELECT cte.type, t.* FROM UNNEST(cte.foos, cte.bars) AS t(foos, bars).

INSTANCE_OFProblem

my goal is to get greatest value for each row — I use PostgreSQL and my goal is to get greatest value for each row. Tension: is there a way i can know which column these values are belong to? Outcome: Expected smth like: id greatest column.

INSTANCE_OFProblem

When selecting multiple `kpi` values in Grafana X-Y chart, series representing each `kpi` become connected by an extra line between them. The chart should show separate lines per `kpi` (with independent colors), but it instead draws a single continuous polyline across series.

INSTANCE_OFProblem

there are two lines of output for Alex, I want the results to aggregate by id and only show one output line — son object is associated with multiple address objects -- each duplicate will represent the identical person name with a different address. Tension: I do not care which city or state shows up in Alex's result. Outcome: All I want is for his name to only show up once.

INSTANCE_OFProblem

Compute a per-user cumulative total of order prices based on the order placement time (createdat), considering only completed orders.

INSTANCE_OFProblem

I am trying to calculate the full distance a driver made — I do have the following three tables within postgres. Tension: I tried different ways but I am not able to solve it. Outcome: Tried cross join and subqueries and many different approaches but still no result.

INSTANCE_OFProblem

select only the parent if both meet it — projects can be nested by `projectA.parent_id = projectB.id`. Tension: or the parent meets it) and only the child if the child meets it? Outcome: The result should be `2,7,8` and not `2,3,7,8`.

INSTANCE_OFProblem

Cannot limit a domain value to at most two occurrences in a table

INSTANCE_OFProblem

I see the expected results using above query. — Now I want to remove the entries from above result which are in table2. Tension: Is there a more efficient of achieving the same result? and are there any cases that I could be missing?

INSTANCE_OFProblem

multiple rows for the same `email` address exist — `created_at` is within the last month. Tension: one of those rows does have a different `externalId` than one of the previous ones. Outcome: For the example table contents, this should only return `foo@example.com`.

INSTANCE_OFProblem

Given a PostgreSQL table with a single text field formatted like '1.1 Covid-19 [cases]', split it into separate columns: questionid (e.g., 1.1), question_name (e.g., Covid-19), and sub_question_name (e.g., cases) along with id.

INSTANCE_OFProblem

How do I check if the timestamp is not between (start_hour1 and end_hour1) and (start_hour2 and end_hour2). — I have a table look like below. Tension: start_hour2 and end_hour2 could be null as well.

INSTANCE_OFProblem

How to translate an Excel named range (a collection of variant cell values) into a SQL representation so that functions like SUM can operate naturally over the range, ideally skipping values that don't make sense.

INSTANCE_OFProblem

Create a PostgreSQL function/query that combines results of multiple aggregate queries (e.g., counts from different tables) into a single-row record.

INSTANCE_OFProblem

show Grand Total only and not Subtotals — you have multiple columns but you want to have a single SUM line. Outcome: The sorting `order by (col_1, sol_2)` ensures that the grant total row is the last one.

INSTANCE_OFProblem

more than one row returned by a subquery used as an expression.

INSTANCE_OFProblem

Querying distinct counts of values inside a PostgreSQL text[] array column (actionServiceIds) with tenantId filtering becomes extremely slow as the permissions table grows (~100k rows). The approach requires unnesting and then grouping/distinct counting per id.

INSTANCE_OFProblem

Trying to find an equivalent in PostgreSQL/EDB for Oracle's ROWID pseudocolumn to uniquely identify a row and use it in queries.

INSTANCE_OFProblem

Tension: I would like to ask if there is a way to use the parser to extract only `create table` statements, ignoring everything else.

INSTANCE_OFProblem

the path list at the end contains nodes with equal G scores — I have an implementation of Astar. Tension: it seems to plot an odd path to the target.

INSTANCE_OFProblem

how to make this program check within the list itself if a person has already purchased more than two tickets. Tension: each person can only buy two tickets.

INSTANCE_OFProblem

I want to write a query to fetch the latest N number of records per team name. Tension: If N is greater than 1 (let's say 3), then it gets tricky. Outcome: How can I write this query in D.

[inerrata]Tags Knowledge Graph Docs About Team Pricing Contact Report a Bug Privacy Terms Cookie Settings Do Not Sell or Share My Info

© 2026 Inerrata

SQL Update-Filter Shape - inErrata Knowledge Graph | Inerrata