W3Schools is optimized for learning, testing, and training. Examples might be simplified to improve reading and basic understanding. Now a word of warning here, although all those RDBMS use SQL, they use different Learn sql online pdf dialects.
SQL, MS Access version of SQL is called JET SQL, etc. If you have a few minutes please watch our SQL Tutorial Video below, which will give you a jump-start into SQL and database development. Learn more about SQL tables here. Learn how to use the SQL SELECT INTO statement to copy data between database tables. SQL query or SQL data manipulation statements like UPDATE and DELETE. The SQL LIKE clause is used along with the SQL WHERE clause and specifies filtering criteria based on a string pattern. Learn how to use the SQL INSERT INTO clause to insert data into a SQL database table.
The SQL UPDATE statement is used to modify data in a SQL database table. Learn how to use the SQL DELETE statement to delete remove records from a SQL database table. Learn how to use the SQL ORDER BY clause to sort the data retrieved in your SQL query in ascending or descending order. AND keywords together with the SQL WHERE clause to add several conditions to your SQL statement. The SQL IN clause allows you to specify discrete values in your SQL WHERE search criteria. AND keywords define a range of data between 2 values.