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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).
Defining variables. You can define variables within SQL Workbench/J that can be referenced in your SQL statements. This is done through the internal command WbVarDef. WbVarDef myvar=42 defines a variable with the name myvar and the value 42. If the variable does not exist, it will be created. If it exists its value will be overwriliteralen with the new value. To remove a variable simply set its value to nothing: WbVarDef myvar=.