Top 5 Best practices to handle Null Values in SQL?
Best practices to handle Null values in SQL?
More Examples :
Avoiding Nulls in WHERE Clauses:
SELECT * FROM table_name WHERE column_name IS NULL;
When checking for NULL values, you should use IS NULL or IS NOT NULL instead of using = or !=, as comparing with NULL using equality operators does not yield meaningful results.
Avoiding Nulls in Primary Keys:
CREATE TABLE products (
id INT PRIMARY KEY, — This ensures id cannot be NULL
name VARCHAR(50)
);
In this example, the id column is defined as the primary key, which means it cannot contain NULL values.
Avoiding Nulls in Index Columns:
CREATE INDEX index_name ON table_name (column_name); — Avoid making column_name nullable
When creating an index, it’s generally a good practice to avoid using columns that can contain a high percentage of NULL values.
Remember to replace table_name and column_name with the actual names from your database schema. These examples demonstrate best practices for handling NULL values in SQL Server using SSMS.
Happy Learning!
Watch video Top 5 Best practices to handle Null Values in SQL? online without registration, duration 14 second in high hd quality. This video was added by user Azurelib Academy 29 September 2023, don't forget to share it with your friends and acquaintances, it has been viewed on our site 3 thousand once and liked it 7 people.