Like (=) |
  
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Like (=) |
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The same as operator is applied to coverage column, and partly to attributes column. In coverage case, outcome shows those registers (polygons) with the same cover as the indicated previously.
Attributes with “=” are transformed into “LIKE” operator. It carries out a “Contains” operation with the specified attribute. This is due to SIOSE data model, because this is his way to identify an attribute at coverage level.
If you don’t select coverage or an attribute, but an operator is selected, it’s going to carry out an operation “IS NULL”. Therefore, only are going to be selected the registers which contains this null value (coverage or attribute, depending on which one are no selected).