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### sql notes

SO let us try some sql notes.

select a.id, a.name
from employees as a
group by a.id
having a.id > 100;


$$\Gamma(z) = \int_0^\infty t^{z-1}e^{-t}dt\,.$$ [\Gamma(z) = \int_0^\infty t^{z-1}e^{-t}dt\,.]

$$x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}$$ [x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}]

$${x}_{1,2}=\frac{-b\pm \sqrt{b^2-4ac}}{2a}$$ [{x}_{1,2}=\frac{-b\pm \sqrt{b^2-4ac}}{2a}]

$$f(x) = \int_{-\infty}^\infty\hat f(\xi)\,e^{2 \pi i \xi x}\,d\xi$$ [f(x) = \int_{-\infty}^\infty\hat f(\xi)\,e^{2 \pi i \xi x}\,d\xi]

This apartment has an area of $100m^2$, one must consider the value of $x_z$ This apartment has an area of $100m^2$ One must consider the value of $x_z$ y^(a+b)^ then something like x~y,z~ y^(a+b)^ then something like x~y,z~

This formula $f(x) = x^2$ is an example. This formula $f(x) = x^2$ is an example.

$\sum_{i=0}^n i^2 = \frac{(n^2+n)(2n+1)}{6}$

$\sum_{i=0}^n i^2 = \frac{(n^2+n)(2n+1)}{6}$