Writing your first SQL queries in SQL Server

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In this video we discuss the equality and inequality math symbols. We go through each of the 6 symbols and show examples explaining each of the symbols. • Transcript/notes • There are 6 major symbols that are used throughout mathematics, less than, less than or equal to, greater than, greater than or equal to, equals and does not equal. • The less than symbol has its open side facing to the right, and its pointy side to the left. For instance, 5 is less than 9, or a is less than b, when you are dealing with unknowns. Using a and b, if b turned out to be 7, a could be any value less than 7. On a number line, this is drawn like this, with a right parenthesis on the number 7 and an arrow going to the left on toward negative infinity. • And parenthesis mean the number is not included, and brackets mean the number is included. • The less than or equal to symbol is almost the same as the less than symbol, except that it has a line under it. An example of this is c is less than or equal to d, so, if d turned out to be 12, c could be 12 or any value less than 12. On a number line, this is drawn like this, bracket on the number 12 and an arrow going to the left on toward negative infinity. • The greater than symbol has its opening side facing to the left and its pointy side facing to the right. For instance, 9 is greater than 5, or b is greater than a, when you are dealing with unknowns. Using a and b, if b turned out to be 11, a could be any value greater than 11. On a number line, this is drawn like this, with a left parenthesis on the number 11. • The greater than or equal to symbol is almost the same as the greater than symbol, except that it has a line under it. An example of this is c is greater than or equal to d, so, if d turned out to be 4, c could be 4 or any value greater than 4. On a number line, this is drawn like this, bracket on the number 4 and an arrow going to the right on toward negative infinity. • The equals symbol means that 2 values are equal. So, if we had t equals r, and we found that r equals 14, then t also equals 14. • This equals sign with a slash through it means does not equal. So, if we had x does not equal y, and we found that y equals 6, then x could be any value except 6. • Timestamps • 0:00 The 6 major math equality inequality symbols • 0:10 The less than symbol explained • 0:39 The less than equal to symbol explained • 1:01 The greater than symbol explained • 1:27 The greater than equal to symbol explained • 1:49 The equal to symbol explained • 1:58 The does not equal symbol explained

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