Questions tagged [default-value]

For questions relating to DBMS-supplied values that are generated when none are explicitly provided.

Filter by
Sorted by
Tagged with
3 votes
1 answer
213 views

Is it safe to use default value with not null when adding a new column?

We have a Rails app powered by Postgresql v11.4 where I want to add a new column with a default value and a not null constraint like below: ALTER TABLE "blogs" ADD "published" ...
user avatar
  • 235
1 vote
0 answers
56 views

Default roles ticked when creating new login through SSMS GUI

When creating a new login via the GUI: In the User Mapping section, certain databases will have some roles pre-ticked in the Database Role Membership section. What controls this behavior? It's ...
user avatar
1 vote
2 answers
515 views

Use default value instead of inserted null

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"(), ...
user avatar
  • 263
0 votes
0 answers
25 views

PostgreSQL now() function store wrong timestamp depending on application

Ciao, I am using postgreSQL 13 and the timezone of the DB is set to 'UTC'. The TZ of the Server (Debian 11 bullseye) is set to 'Europe/Berlin'. The command show timezone displays 'UTC' I have several ...
user avatar
0 votes
0 answers
35 views

How to specify default CREATE TABLE values just once?

Is there any way I can just say once that the default type should be TEXT, and the default value should be '' for all CREATE TABLEs? Currently I must do: CREATE TABLE "t" (dbm TEXT DEFAULT ''...
user avatar
0 votes
0 answers
448 views

MySQL 8.0 timestamp CURRENT_TIMESTAMP sets date to '0000-00-00 00:00:00' (was ok in 5.7)

The table T has this field +---------------+--------------+------+-----+-------------------+-----------------------------+ | Field | Type | Null | Key | Default | Extra ...
user avatar
  • 395
0 votes
1 answer
59 views

How to create a trigger that generate a random specific output to insert into a table in MariaDB?

I have an account table which is laid out in 3NF: CREATE TABLE account ( account_id INT AUTO_INCREMENT, customer_id INT NOT NULL, account_type_id VARCHAR(15) NOT NULL, is_active ...
user avatar
  • 13
1 vote
2 answers
379 views

SQL Server - how to define default value function that require column name?

Column names are not permitted when declaring default column value. Is there a workaround to achieve something like this? CREATE TABLE [dbo].[Tasks] ( [TaskId] INT IDENTITY(1,1) NOT NULL, [...
user avatar
  • 121
0 votes
2 answers
39 views

Conditionally use computed column

IS it possible that a not nullable column can be setup to either a) add value freely with INSERT/UPDATE query b) if value not provided on insert, to avoid null entry added default the value to that of ...
user avatar
  • 143
3 votes
1 answer
771 views

Is it possible to automatically generate a Unix millisecond timestamp in MySQL 5.7

I have created a created_time field with BIGINT in a MySQL 5.7 table, now I want to auto generate a Unix millisecond timestamp when I insert a record. Is it possible to do this? I have tried the code ...
user avatar
  • 477
0 votes
1 answer
9k views

How to set default value as empty string for all rows at once in MySQL while creating the table

In MySQL, while creating a table, I'like to have empty string '' as value for all needed columns instead of 'NULL'. Is it possible, is it safe and how can I do to do that at once? I have the following ...
user avatar
-1 votes
1 answer
61 views

Nullable integer as part of composite primary key

I want to store phone numbers as integers and I've created this SQL: DROP TABLE `user_id_phone`; CREATE TABLE `user_id_phone` ( `user_id` int unsigned NOT NULL, `country_code` ...
user avatar
0 votes
0 answers
10 views

change db column default from NULL to <null>

When inserting rows in table, a default value is a NULL. Is their a way to make "<null>" such that, +--------------+-------------+------+-----+-------------------+----------------+ | Field ...
user avatar
  • 101
1 vote
2 answers
30 views

Insert to a table using function with default arguments

I'm trying to write a function that makes an insert to the table defined below: DROP TABLE IF EXISTS pl_table; CREATE TABLE pl_table ( id SERIAL PRIMARY KEY, mandatory VARCHAR NOT ...
user avatar
  • 111
0 votes
1 answer
160 views

creating new table partition with values already existing in the default partition

I have the following table: CREATE TABLE orders ( info_date date, country_code VARCHAR, order_total int, CONSTRAINT orders_pk PRIMARY KEY (info_date, country_code) ) PARTITION BY LIST (...
user avatar
  • 155
5 votes
1 answer
2k views

Why mysql throws "invalid default value for field" only when two or more timestamp fields exist in the create statement?

In mysql 5.7.28 I create a table like this: create table t1 ( id int not null, d1 timestamp) engine=innodb; which works fine and creates d1 as non-null with default value current_timetamp,on update ...
user avatar
0 votes
1 answer
3k views

What is the default quota on a tablespace for a given user in oracle if you don't set one?

My environment I'm using Oracle Database 12c Enterprise Edition Release 12.2.0.1.0 - 64bit Production Explanation of the situation I was creating a user with the following command create user ...
user avatar
0 votes
2 answers
174 views

Insert records from one table to other with default serial

I have two tables with same structure, first column gid as serial, and many other columns after that. I want to insert selected rows from one table to the other. Without serial it is really easy: ...
user avatar
  • 101
6 votes
2 answers
3k views

Is DEFAULT NULL and 'nullable value without default' completely the same?

ALTER TABLE test_table ADD COLUMN a DEFAULT NULL; vs. ALTER TABLE test_table ADD COLUMN a; Both columns will set NULL if column a is not specified. As far as I know, if I add a column into a table ...
user avatar
0 votes
1 answer
63 views

What is the default column name given to a TABLE() type with a single column

CREATE OR REPLACE TYPE MISSING_KEYS AS TABLE OF VARCHAR2(256); SELECT [¿what goes here?] as missing_key FROM TABLE (MISSING_KEYS('A','B','C','D')) What is the default column name that should be in [¿...
user avatar
0 votes
1 answer
28 views

Alternative defaults with a different table name

Say the original table has DEFAULT nextval('some_sequence'). I'm looking for a way to specify DEFAULT nextval('another_sequence') on a table view/alias so that I can just insert into the alias as ...
user avatar
  • 611
0 votes
1 answer
24 views

Defaulting a column to the 1st of next month

I'm trying to find the most elegant means of defaulting a column's value to the 1st of next month. The best I've been able to come up with is this: ALTER TABLE Foo ADD Bar datetimeoffset(0) NOT NULL ...
user avatar
  • 103
1 vote
1 answer
2k views

How can I create a unique and random alphanumeric string using MySQL's Default Value? (v 5.6)

I am building a MySQL database and think using implicit DEFAULTS seems very promising. I am successfully using DEFAULT CURRENT_TIMESTAMP and DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP for ...
user avatar
  • 111
3 votes
1 answer
2k views

SQLServer add a default value for a column [closed]

I am using MS SQL Server. I have an "action" table with an "action_type" column that I want to set a default value of "to do" for. My DDL in MS SQL Studio errors! I have read many many articles trying ...
user avatar
2 votes
1 answer
605 views

Missing right parenthesis after (or before) default 0, Oracle

I am trying to create a table with Oracle SQL where two columns of the table should have a default value and should not be NULL. I am getting the error you can see below, but i am not able to ...
user avatar
  • 175
0 votes
0 answers
348 views

DROP DEFAULT on psql restore fails because column not existing anymore

A dump creates a command to remove default values like: ALTER TABLE IF EXISTS test.simulation ALTER COLUMN gid DROP DEFAULT; When on restore the column with the default value do not exist anymore, ...
user avatar
  • 131
0 votes
2 answers
5k views

Default values in function, arguments dependency, PostgreSQL

I would like to write a function with two arguments, which would have dependency. Something like this: CREATE OR REPLACE FUNCTION years_compare( IN year1 integer DEFAULT date_part('year'::...
user avatar
3 votes
1 answer
63 views

How to replace default on a table

I have a very big table and added a new NOT NULL column with DEFAULT on it. Not an unusual thing in DWH environment. It is an online operation, it works very quickly, and stores default in a table ...
user avatar
  • 335
1 vote
1 answer
593 views

Why is cross db ownership chaining on by default for system DB

I am reading about cross db ownership chaining Server Configuration Option It talks about how and why to use (or not) this option and says Setting cross db ownership chaining to 1 is not ...
user avatar
0 votes
1 answer
130 views

Performance: ALTER TABLE with default value vs. iterating over all records to set new value [closed]

For adding values to a new column, I have the following options: Using default to add value during ALTER TABLE command. Doing ALTER TABLE without default, then fetching all the records and iterating ...
user avatar
  • 111
1 vote
1 answer
648 views

How do I an add a DEFAULT on a column if the table already exists?

I want to add a DEFAULT for a timestamp column in PostgreSQL. With SQL Server you use ALTER TABLE ADD CONSTRAINT You can see the example in their docs, ALTER TABLE dbo.doc_exz ADD CONSTRAINT ...
user avatar
  • 21
3 votes
1 answer
3k views

Convert varchar column to inet

I have a table column containing IP addresses, datatype is varchar(255). I want to switch to inet datatype now. Is there a way to convert existing addresses in IP column to inet datatype? Tried: ...
user avatar
2 votes
1 answer
9k views

How can I set a default now() timestamp in a timestamp array?

I want to have a timestamp array which tracks a series of events. The first event always happens when the row is created, so I want the array to be instantiated with an initial default value. I've ...
user avatar
1 vote
2 answers
104 views

Is there an sp_reset or the equivalent?

Let's say I was monkeying around on SQL Server and I wanted to reset everything to factory defaults, is that currently possible? EXEC sp_configure 'show advanced options', 1 EXEC sp_configure 'stupid ...
user avatar
  • 56.2k
1 vote
0 answers
66 views

How to save SSMS 2012 Object Explorer Scripting Settings?

I'm generating a bunch of object creation scripts in SSMS 2012, using the Object Explorer context menu. The default options for these generated scripts are not to my liking (for example, I want the ...
user avatar
  • 141
3 votes
1 answer
7k views

Insert Into table ommitting columns that have default values

I have a PostgreSQL database with lots of tables of the same structure, 36 columns in total: CREATE TABLE some_schema.some_table ( id integer NOT NULL DEFAULT nextval('some_schema.id_seq'::...
user avatar
  • 133
0 votes
0 answers
223 views

MySQL listens at port 3306 even after changing it

I changed MySQL default port from 3306 to 12929 in my.cnf in both client and mysqld sections on Debian. After that I restarted MySQL service. Then I ran netstat -tln and saw that MySQL is still ...
user avatar
20 votes
2 answers
5k views

DEFAULT CONSTRAINT, worth it?

I usually design my databases following next rules: Nobody else than db_owner and sysadmin have access to the database tables. User roles are controlled at application layer. I usually use one db ...
user avatar
  • 22.8k
8 votes
2 answers
64k views

PostgreSQL, what is the hostname address of my default database?

I just created a PostgreSQL database on my laptop (following these instructions), which is running Linux CentOS 7. Now I would like to understand what is the hostname address of my default database. ...
user avatar
0 votes
2 answers
336 views

List default column values for all tables in a database [closed]

I would like to list the default values for all columns in all tables in an Oracle database. The objective is to review the default values, and find any that need updating. There are hundreds of ...
user avatar
  • 1,389
2 votes
0 answers
2k views

Something similar to GENERATED ALWAYS for a DEFAULT? (SQL Server / Azure SQL)

Question: Is there any way to force a column to always use the default value definition? I would like to always have the user_id populated on an insert/update (I know delete might be a bit different) ...
user avatar
1 vote
2 answers
79 views

PostgreSQL to SQL Server Migration Error Caused by Default Value Expression

I am working on integrating databases from both MySQL and Postgres into SQL Server. My data migration from Postgres to SQL Server is failing because of the default value expression in Postgres. This ...
user avatar
  • 215
0 votes
1 answer
788 views

In SQL Server, how do you create a default constraint for a column using the result or return value from a Stored procedure?

In SQL Server, can you create a default constraint for a column using the result or return value from a Stored procedure, and if so how? So I am thinking of something along the lines of this, but ...
user avatar
  • 437
6 votes
2 answers
1k views

Can you use an inserted variable in a default constraint

Working in SQL Server, let's say I have a database with two tables: events and competitors. events has the following columns: [event_id] [event_name] [winner_id] [loser_id] competitors has the ...
user avatar
2 votes
1 answer
1k views

Calculated Field Updating Every Row

I added a calculated field to my table, and only want to update NULL rows (or "new" rows). Something is going awry, and every row in my table is being updated with the current DateTime when 1 row is ...
user avatar
5 votes
1 answer
2k views

In SQL server is a check constraint applied before or after a default constraint on insert?

As per the title: In SQL server is a check constraint applied before or after a default constraint on insert? So taking the following table (Unnecessary columns omitted for brevity)... CREATE TABLE [...
user avatar
  • 437
5 votes
1 answer
6k views

Cannot alter MYSQL Table (stuck in a invalid default value loop)

Some how I have 2 columns with incorrect default values. Not sure how it got created in the first place as I imported the db from another source. Problem now is, I cannot make any changes to the ...
user avatar
  • 153
3 votes
1 answer
3k views

How to set column DEFAULT using value of a variable

In a script for setting up a database which uses random UUIDs for primary keys, I have: CREATE TABLE alpha (id UUID PRIMARY KEY DEFAULT uuid_generate_v4(), value INT); CREATE TABLE beta (aref UUID ...
user avatar
2 votes
1 answer
7k views

How can I set TIMESTAMP's default to future date?

I know I can set default value with current timestamp like this ... DEFAULT CURRENT_TIMESTAMP Is there any way to set the column with fixed amount of units based on current timestamp? ... DEFAULT ...
user avatar
  • 195
0 votes
1 answer
16k views

Adding a default constraint in Oracle while altering a column

I'm new to Oracle. I need to port a SQL Server command to Oracle. I want to alter a column to add a new constraint with a default value. SQL Server command ALTER TABLE <schema_name>.<...
user avatar
  • 11