LIMIT, SELECT TOP, and ROWNUM are all keywords used in database management systems to limit the number of records returned by a query.
LIMIT:
LIMIT is a keyword used in MySQL and PostgreSQL databases to limit the number of records returned by a query. It specifies the maximum number of records to return from the result set. For example, SELECT * FROM table_name LIMIT 10 will return the first 10 records from the table.
SELECT TOP:
SELECT TOP is a keyword used in Microsoft SQL Server to limit the number of records returned by a query. It specifies the maximum number of records to return from the result set. For example, SELECT TOP 10 * FROM table_name will return the first 10 records from the table.
ROWNUM:
ROWNUM is a keyword used in Oracle databases to limit the number of records returned by a query. It assigns a unique row number to each row in the result set, which can then be used to limit the number of records returned. For example, SELECT * FROM table_name WHERE ROWNUM <= 10 will return the first 10 records from the table.
All of these keywords serve a similar purpose, which is to limit the number of records returned by a query. However, they have slightly different syntaxes and are specific to different database management systems.
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