W3Schools
w3schools.com › sql › func_mysql_ifnull.asp
MySQL IFNULL() Function
SQL Examples SQL Editor SQL Quiz SQL Exercises SQL Server SQL Syllabus SQL Study Plan SQL Bootcamp SQL Certificate SQL Training ... The IFNULL() function returns a specified value if the expression is NULL.
W3Schools
w3schools.com › sql › sql_isnull.asp
W3Schools.com
String Functions: ASCII CHAR_LENGTH ... BINARY CASE CAST COALESCE CONNECTION_ID CONV CONVERT CURRENT_USER DATABASE IF IFNULL ISNULL LAST_INSERT_ID NULLIF SESSION_USER SYSTEM_USER USER VERSION SQL Server Functions...
mysql - SQL IFNULL on SELECT * statement - Stack Overflow
Is there a way to set a default value for all returned values that are null, specifically in MySql? Instead of SELECT IFNULL(foo, 0), IFNULL(bar, 0), IFNULL(baz, 0) FROM table I would l... More on stackoverflow.com
what is the meaning of ISNULL AND COALESCE in simple terms?
IS NULL means “when the field is blank”. Null is the absence of data. A space is not null. Any character is not null. If there is any data in the field than it is not null. Coalesce is like a hierarchy of fields: imagine you have phone numbers for contacts but you want the single most important phone number. Cell is better than work phone. Work phone is better than fax right? So if you coalesce: cell, phone, (in that order) you get the single most important number per person. Ie: if cell is null then gimme the work number, else gimme the fax so that HOPEFULLY, I have a number. And if I have a number, it is the most important. More on reddit.com
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August 16, 2022COALESCE vs IFNULL - Performance and behavioural differences
It doesn't matter. The only difference between these functions is that COALESCE can take any number of arguments, and IFNULL/NVL takes exactly 2. Snowflake offers both to make it easier to port your SQL from other platforms. There's not going to be a performance difference between these two. More on reddit.com
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June 3, 2024Isnull v Case when is null
Pretty much the same in your scenario. The biggest difference is IsNull returns a datatype of the first argument in all cases. Case returns the datatype of the argument that has highest precedent. More on reddit.com
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October 19, 2021Videos
Snowflake Documentation
docs.snowflake.com › en › sql-reference › functions › ifnull
IFNULL | Snowflake Documentation
SELECT supplier_id, supplier_name, phone_region_1, phone_region_2, IFNULL(phone_region_1, phone_region_2) IF_REGION_1_NULL, IFNULL(phone_region_2, phone_region_1) IF_REGION_2_NULL FROM suppliers ORDER BY supplier_id;
W3Schools
w3schools.com › mysql › mysql_ifnull.asp
MySQL IFNULL() and COALESCE() Functions
The MySQL IFNULL() function lets you return an alternative value if an expression is NULL. ... If you want to use W3Schools services as an educational institution, team or enterprise, send us an e-mail: [email protected] · If you want to ...
InterSystems
docs.intersystems.com › irislatest › csp › docbook › DocBook.UI.Page.cls
IFNULL (SQL) | InterSystems SQL Reference | InterSystems IRIS Data Platform 2025.3
IFNULL(expression-1,expression-2,expression-3): if expression-2 and expression-3 have different data types, returns the data type with the higher (more inclusive) data type precedence. If expression-2 or expression-3 is a numeric literal or a string literal, returns data type VARCHAR.
StrataScratch
stratascratch.com › blog › introduction-to-ifnull-function-in-sql
Introduction to IFNULL() Function in SQL - StrataScratch
October 19, 2023 - It evaluates if the first expression is NULL, just like the IFNULL() function in MySQL. If NULL, the second expression is evaluated, and so on, until a NON-NULL value is found. In this example, we apply the SQL IFNULL() function to a hard-level interview question asked by Google.
IONOS
ionos.com › digital guide › server › configuration › sql ifnull
How to use the SQL IFNULL() function to output alternative values
February 7, 2025 - The SQL IFNULL() function is used to check the value of an expression. If this is NULL, an alternative value is output instead.
Databricks
docs.databricks.com › reference › sql language reference › functions › built-in functions › alphabetical list of built-in functions › ifnull function
ifnull function | Databricks on AWS
November 9, 2023 - Learn the syntax of the ifnull function of the SQL language in Databricks SQL and Databricks Runtime.
DataCamp
datacamp.com › doc › mysql › mysql-ifnull
MySQL IFNULL Keyword: Usage & Examples
Here, `IFNULL` ensures that a missing `last_name` is replaced with 'Unknown', allowing for complete name concatenation. sql SELECT product_name, price, quantity, IFNULL(price * quantity, 0) AS total_value FROM products;
MySQL
dev.mysql.com › doc › refman › 8.4 › en › flow-control-functions.html
MySQL :: MySQL 8.4 Reference Manual :: 14.5 Flow Control Functions
If expr1 is not NULL, IFNULL() returns expr1; otherwise it returns expr2.
IBM
ibm.com › docs › en › db2-for-zos › 12.0.0
IFNULL scalar function - Db2 SQL
The IFNULL function returns the first nonnull expression.
Alteryx
help.alteryx.com › aac › en › trifacta-classic › wrangle-language › type-functions › ifnull-function.html
IFNULL Function
The IFNULL function writes out a specified value if the source value is a null. Otherwise, it writes the source value. Input can be a literal, a column reference, or a function. The NULL function generates null values. See NULL Function. The ISNULL function simply tests if a value is null.
Microsoft Learn
learn.microsoft.com › en-us › azure › databricks › sql › language-manual › functions › ifnull
ifnull function - Azure Databricks - Databricks SQL | Microsoft Learn
March 1, 2024 - Learn the syntax of the ifnull function of the SQL language in Databricks SQL and Databricks Runtime.
w3resource
w3resource.com › mysql › control-flow-functions › if-null-function.php
MySQL IFNULL() function - w3resource
June 29, 2024 - The IFNULL() function evaluates the first argument (0). Since 0 is not NULL, the function returns this value, ignoring the second argument (2). Hence, the query returns 0 as the output.
Tunecore
tech.tunecore.com › coalesce-and-ifnull
How to Use COALESE, IFNULL and NULLIF
IFNULL(some_col, return_val): This returns the first argument if it’s non-NULL. If it is NULL, it returns the second argument.
StarRocks
docs.starrocks.io › reference
ifnull | StarRocks
If expr1 is NULL, returns expr2. If expr1 is not NULL, returns expr1.
Top answer 1 of 3
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A result of a function in SQL is a single value (column), not a list of columns. So there isn't, and can't be, such a construct. You'd have to handle every column individually, unfortunately.
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You could add default values to the table if you don't care about preserving NULL:
ALTER TABLE yourTable ALTER foo SET DEFAULT 0;
You could also create a view where you write out each of the IFNULL() statements once and just use that to save from re-typing it all the time.
But as others indicated, no construct to do it simply like you hoped.
You can also quickly do repetitive things like this using table metadata:
SELECT CONCAT("IFNULL(",`COLUMN_NAME`,",0)")
FROM `INFORMATION_SCHEMA`.`COLUMNS`
WHERE `TABLE_SCHEMA`='yourdatabasename'
AND `TABLE_NAME`='yourtablename';
Apache
spark.apache.org › docs › latest › api › python › reference › pyspark.sql › api › pyspark.sql.functions.ifnull.html
pyspark.sql.functions.ifnull — PySpark 4.0.1 documentation
pyspark.sql.functions.ifnull(col1, col2)[source]# Returns col2 if col1 is null, or col1 otherwise. New in version 3.5.0. Parameters · col1Column or str · col2Column or str ·
Study.com
study.com › courses › computer science courses › introduction to sql
SQL: IFNULL Function | Study.com
The IFNULL function takes two arguments. It checks to see if the first argument is not NULL. If it is not NULL, it returns the first argument. Otherwise, it returns the second argument.
GeeksforGeeks
geeksforgeeks.org › sql › ifnull-in-mysql
IFNULL in MySQL - GeeksforGeeks
March 3, 2018 - SELECT IFNULL( (SELECT NAME from employee where id = 2), 'NULL') as NAME;