SET DELIMITERS is included for backward compatibility.

ON
 Issuing SET DELIMITERS ON displays delimiters in @ ... GET fields. The default delimiting characters are colons (:). A colon is placed on the left and right side of the field to indicate where to enter data.

OFF
 If SET DELIMITERS is OFF, no delimiters are displayed in fields created with @ ... GET. This is the default setting.

TO expC
 Specify one or two delimiting characters with expC. Fields are delimited on both sides by the same character if expC includes one character. If expC includes two characters, the first character is the left delimiter and the second character is the right delimiter.

TO DEFAULT
 Use SET DELIMITERS TO DEFAULT to reset the delimiters to the default colons.

Other Resources

Backward-Compatible Language Elements