mysql - Pattern for LIKE in SQL Statement -

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I would like to select all the rows that begin with any character. 

  SELECT * FROM as the table WHERE field '[AG]%';   
 I would like to show the type of rows:  
  ID data 993 DEF055900960 994 DEF055900961 995 DEF05 9 0064 996 DEF056102254 997 DEF056131201   
 I have tried RLIKE and REGEXP arbitrarily and in addition the upper case AZ OT in the pattern has been added.  
 Why the following is not working?  
 
 
 
  SELECT * from table WHERE field RLIKE '[a-z]';   
  
 I went from here to read

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