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You use variables as symbolic names for values in your application. The names of variables, called identifiers, conform to certain rules. A JavaScript identifier must start with a letter, underscore (_), or dollar sign ($); subsequent characters can also be digits (0-9).
and we said... You are confusing a DEFINE variable -- which works like a macro variable, it is physically replaced in the statement prior to execution -- with a bind variable which is a placeholder in a sql query to be filled in with a value at runtime. To use define, you do something like: ops$tkyte@8i> define naming='Ivan'.