Default value in select query for null values in postgres
3 Answers Sorted by 44 The problem is a mismatch of datatypes Missing is text but the product type code is numeric Cast the product type code to text so the two values are compatible select CASE WHEN prodTypeCode IS NULL THEN Missing ELSE prodTypeCode varchar 40 END as ProductCode SUM amount From sales group by prodTypeCode
Postgresql Use default value instead of inserted null Database , Use default value instead of inserted null Ask ion Asked 1 year 9 months ago Modified 9 months ago Viewed 7k times 3 I have a table definition in Postgres that use now for timestamp and current user for auditing date created date NULL DEFAULT now edited by varchar NULL DEFAULT current user
Postgresql To Return 0 when Null
2 Answers Sorted by 19 Use max coalesce logincount 0 to avoid NULLs According to Postgres docs 9 6 The COALESCE function returns the first of its arguments that is not null Null is returned only if all arguments are null It is often used to substitute a default value for null values when data is retrieved for display for example Share
Postgresql Is it safe to use default value with not null when adding , Asked May 12 2022 at 11 14 ogirginc 265 2 3 10 Add a comment 1 Answer Sorted by 7 That statement is safe An ALTER TABLE will never lock the database it will only lock the table Postgres will not actually rewrite the table because you provided a constant value false for the default value
How can I use a default value in a Select query in PostgreSQL
How can I use a default value in a Select query in PostgreSQL , 5 Answers Sorted by 66 SELECT coalesce MAX post id 0 AS max id FROM my table WHERE org id 3 or SELECT case count when 0 then 0 else MAX post id end AS max id FROM my table WHERE org id 3 if you want max post id to be null when there is 1 row but post id is null dbfiddle Share Improve this answer Follow edited Mar 1 2017 at 13 50
PostgreSQL IS NULL Operator Condition CommandPrompt Inc
Postgresql Is DEFAULT NULL and nullable value without default
Postgresql Is DEFAULT NULL and nullable value without default If there is no DEFAULT clause this is merely a metadata change and does not require any immediate update of the table s data the added NULL values are supplied on readout instead Note that this has changed with Postgres 11 When you add a column with a static default e g default 42 the table won t be re written either
How To Replace Null Values With Default Values In PostgreSQL
2 Answers Sorted by 13 The default default value for any new table column is the default value of the data type And the default default value for data types is NULL which is the case for all basic data types in Postgres But any valid value is allowed for custom types or domains The manual on CREATE TYPE Postgresql How to use default value of data type as column default . The first statement adds a column with a default value of NULL meaning an insert will set null if not explicitly included in the insert The second statement adds a column with a constraint that the column value may be NULL as the opposite of the NOT NULL constraint Share Improve this answer Follow answered Nov 3 2017 at 8 50 wmorrell Documentation tells that providing DEFAULT value for the new column makes PostgreSQL to rewrite all the tuples but I don t think that it s true for this case cause default value is NULL I ran some tests on copy of this table and the first statement without DEFAULT NULL took a little bit more time than the second I can t understand why
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