title: From (SQL)
text: # From (SQL)
  
  The SQL From clause is the source of a rowset to be operated upon in a Data Manipulation Language (DML) statement. From clauses are very common, and will provide the rowset to be exposed through a Select statement, the source of values in an Update statement, and the target rows to be deleted in a Delete statement.
  
  FROM is an SQL reserved word in the SQL standard.
  
  The FROM clause is used in conjunction with SQL statements, and takes the following general form:
  
  The From clause can generally be anything that returns a rowset, a table, view, function, or system-provided information like the Information Schema, which is typically running proprietary commands and returning the information in a table form.
  
  ## Examples
  
  The following query returns only those rows from table mytable where the value in column mycol is greater than 100.
  
  ## Requirement
  
  The From clause is technically required in relational algebra and in most scenarios to be useful. However many relational DBMS implementations may not require it for selecting a single value, or single row - known as DUAL table in Oracle database.
  
  Other systems will require a From statement with a keyword, even to select system data.
  
  