Tutorial by Topics: and

-- Create simple index CREATE INDEX index_name ON table_name(column_name1 [, column_name2, ...]) -- Create unique index CREATE UNIQUE INDEX index_name ON table_name(column_name1 [, column_name2, ...] -- Drop index DROP INDEX index_name ON tbl_name [algorithm_option | lock_option] ....

Rust uses Result<T, E> values to indicate recoverable errors during execution. Unrecoverable errors cause Panics which is a topic of its own. Details of error handling is described in The Rust Programming Language (a.k.a The Book)

Several Excel formulas deal with rounding and precision of non-integer numbers. This is separate from using cell formatting that affects the display of numeric data. In some cases just using cell formatting is sufficient, but in complex calculations, strict rules for rounding and precision are req...

DEX means Android app's (APK) executable bytecode files in the form of Dalvik Executable (DEX) files, which contain the compiled code used to run your app. The Dalvik Executable specification limits the total number of methods that can be referenced within a single DEX file to 65,536 (64K)—includin...

This section provides an overview of what android-activity is, and why a developer might want to use it. It should also mention any large subjects within android-activity, and link out to the related topics. Since the Documentation for android-activity is new, you may need to create initial vers...

The Pandas datareader is a sub package that allows one to create a dataframe from various internet datasources, currently including: Yahoo! Finance Google Finance St.Louis FED (FRED) Kenneth French’s data library World Bank Google Analytics For more information, see here.

Fragments are very important components of user interface in android apps. They were introduced first in Android 3.0 (Honeycomb) API. Understanding design paradigm of Fragments Fragments were introduced for primarily supporting modular and flexible UI on large screen devices such as tablets. ...

DataFrame.merge(right, how='inner', on=None, left_on=None, right_on=None, left_index=False, right_index=False, sort=False, suffixes=('_x', '_y'), copy=True, indicator=False) Merge DataFrame objects by performing a database-style join operation by columns or indexes. If joining columns ...