To use with predefined update method from android, use it as below:
ContentValues args = new ContentValues();
args.put("col_name", "new value");
db.update("table_name", args, String.format("%s = ?", "primary_column"),
new String[]{"primary_id"});
Or to run as a single line, go with this (not recommended):
db.execSQL("UPDATE table_name SET col_name='new_value' WHERE
primary_column='primary_id'");
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