How can I subtract one data from another; what is in the qlite database by means of an edit text? and show the result in a textview

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How can I subtract one (numeric) data from another; what is in the qlite database by means of an edit text? and display the result in a textview.

    
asked by Jesus Diego Ramirez Martinez 02.06.2018 в 22:34
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Why do not you recognize the column name with sqlite3? Android Studio 3.1.2 Emulator: Process finished with exit code -1073741511 (0xC0000139)