Learn the SQL BETWEEN operator to filter values within a range. Use BETWEEN with numbers, dates, and text. Combine with NOT BETWEEN for exclusions. Free tutorial.
Tag: Learn SQL
SQL IN Operator — How to Filter by a List of Values
Learn the SQL IN operator to filter rows by a list of values. Replace multiple OR conditions with a clean IN clause. Free tutorial with practical examples.
SQL Wildcards — Complete Guide to Pattern Matching Characters
Learn all SQL wildcard characters for pattern matching. Master the % and _ wildcards, combine them with LIKE, and search data with precision. Free tutorial with examples.
SQL LIKE Operator — How to Search for Patterns in Text
Learn the SQL LIKE operator for pattern matching. Use % and _ wildcards to search strings, filter text data, and find partial matches with practical examples.
SQL COUNT, AVG, SUM — How to Perform Calculations on Data
Learn SQL aggregate functions COUNT, AVG, and SUM. Count rows, calculate averages, and sum values with WHERE conditions. Free tutorial with examples.
SQL MIN and MAX — How to Find Minimum and Maximum Values
Learn SQL MIN and MAX functions to find the smallest and largest values in a column. Use with WHERE, aliases, and GROUP BY with practical examples.
SQL TOP, LIMIT and FETCH FIRST — How to Limit Rows Returned
Learn how to limit the number of rows returned in SQL using LIMIT, TOP, and FETCH FIRST. Restrict results for pagination and top-N queries with practical examples.
SQL DELETE — How to Remove Rows from a Table
Learn the SQL DELETE statement to remove rows from a database table. Delete specific rows with WHERE, delete all rows, and avoid common mistakes with practical examples.
SQL UPDATE statement — How to Modify Existing Data in a Table
Learn the SQL UPDATE statement to modify existing data in a database table. Update single rows, multiple rows, and multiple columns with practical examples and exercises.
SQL NULL Values — How to Handle Missing Data
Learn how to handle NULL values in SQL. Use IS NULL and IS NOT NULL to check for missing data, and COALESCE to replace NULLs with default values. Free tutorial with examples.