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What is this symbol <> in SQL?

Contents
  1. What does <> 0 mean in SQL?
  2. Is != The same as <>?
!=


What does <> 0 mean in SQL?

“Every [SQL] data type includes a special value, called the null value,”0 “that is used to indicate the absence of any data value”.1. The null value does not indicate why a value is absent—it simply marks the places that do not have a data value.

Is != The same as <>?

Although they function the same way, != means exactly "not equal to", while <> means greater than and less than the value stored. Consider >= or <= , and this will make sense when factoring in your indexes to queries...

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