replace null with 0 in sql
SELECT IFNULL(Price, 0) FROM Products;
SELECT COALESCE(Price, 0) FROM Products;
-- Oracle (extra):
SELECT NVL(Price, 0) FROM Products;replace null with 0 in sql
SELECT IFNULL(Price, 0) FROM Products;
SELECT COALESCE(Price, 0) FROM Products;
-- Oracle (extra):
SELECT NVL(Price, 0) FROM Products;replace null in sql
CASE WHEN ColumnName IS NULL THEN 'anyText'
ELSE ColumnName END
---------EXAMPLE --------------------------
SELECT E.Name as Employee, CASE WHEN M.Name IS NULL THEN 'No Manager'
ELSE M.Name END as Manager
FROM tblEmployee E
LEFT JOIN tblEmployee M
ON E.ManagerID = M.EmployeeIDhow to replace null values in sql
--See records where specific column is NULL
SELECT * from table1 WHERE column1 ISNULL
--Update all the NULL values in the selected column
UPDATE table1 SET column1 = replace_value WHERE column1 ISNULLReplace null values
# Replace null values
df4.na.fill(50).show()
# +---+------+-----+
# |age|height| name|
# +---+------+-----+
# | 10| 80|Alice|
# | 5| 50| Bob|
# | 50| 50| Tom|
# | 50| 50| null|
# +---+------+-----+
df5.na.fill(False).show()
# +----+-------+-----+
# | age| name| spy|
# +----+-------+-----+
# | 10| Alice|false|
# | 5| Bob|false|
# |null|Mallory| true|
# +----+-------+-----+
df4.na.fill({'age': 50, 'name': 'unknown'}).show()
# +---+------+-------+
# |age|height| name|
# +---+------+-------+
# | 10| 80| Alice|
# | 5| null| Bob|
# | 50| null| Tom|
# | 50| null|unknown|
# +---+------+-------+Copyright © 2021 Codeinu
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