Answer Posted / hr@tgksolutions.com
Several steps may be involved in SQL data cleaning and preprocessing:
Use the ROW_NUMBER() window function or the DISTINCT keyword to eliminate duplicates.
Managing missing values: To replace NULL values, use functions such as COALESCE.
Use the CAST or CONVERT functions to fix data types.
Utilize string functions like as LOWER, UPPER, TRIM, and others to standardize formats.
| Is This Answer Correct ? | 0 Yes | 0 No |
Post New Answer View All Answers
Explain the concepts of a primary key and foreign key.
how Data is stored in a file so that Direct Searching can be performed
What is cardinality in db?
What are the main components of a database system?
What you know in mapping of erd to dfd?
Why not phenix, the zelinka/otwinoski libraries, etc?
What is rdbms and its features?
What is cold backup and hot backup (in case of oracle)?
What are different partitioning techniques in database?
How does index hunting help in improving query performance?
What is the function of DML Compiler?
What is system r?
Explain what are tp-lite and tp-heavy monitors?
How to load a file into database column?
Which free database is best?
