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10 gru 2013 · SELECT DISTINCT LEFT(text_column, 900) ... While the cast/convert answers work, and while it's questionable to want to perform a distinct operation on data this large in the first place, the real fix is to stop using the TEXT data type.
SELECT key, (array_agg(value))[1] AS value FROM tableX GROUP BY key ; You can optionally order values inside array to select biggest or smallest of them: SELECT key, (array_agg(value) ORDER BY value DESC)[1] AS value FROM tableX GROUP BY key ; (checked on PostgreSQL)
23 wrz 2023 · Thankfully, SQL provides several approaches to identify distinct or unique values within a column or a dataset. 1. DISTINCT keyword. One of the simplest and most commonly used methods is to use the DISTINCT keyword. This approach allows us to retrieve only unique values from a specified column or columns.
2 lut 2023 · Finding Unique References of Data. We can use SQL SELECT Distinct to find unique references of data. For example, we have a result set that shows different rows of a table and each row consists of columns.
23 lut 2023 · As its name implies, the DISTINCT keyword is commonly used in a SQL SELECT statement to return a distinct set of values. This tip will look at several simple examples of using SELECT DISTINCT that you can copy, paste, and edit for your needs.
16 mar 2016 · I want to get only rows having a different values in a column(column name DEF) based on the duplicate rows having unique combination of other 3 columns. Example: In the below example first two row...
31 lip 2013 · For each unique ID I want to return the value in parameter3, the decision from which row to return this value is based on the values in parameter1 and parameter2 and the date: If there is a row with both parameters being 0 , I want the value in this row.
