8/10/2023 0 Comments Mysql query to visidata![]() You can see that I selected 3 countries from there and g-ENTER will add a new sheet with all rows filtered on those values. One function that is really useful is the frequency histogram when, on a column, Shift- F opens a sheet with the distinct value and their frequency percentage.įor example, on the "orders" table, "ship_country" column I get the following: The column type should be correctly detected but can be changed with ~, #, %, $, can select rows with s, u, t or with a | search and then " to put them in a new sheet. And you can pin the key ones on the left with !. h and l selects the columns, H and L can move them. With ENTER on a line it opens a sheet on the table and you can navigate. So, with the command above the first sheet is the list of tables in the public schema (or another you set with -postgres-schema). Anyway, don't panic, when reading data, VisiData is executing optimized queries with DECLARE CURSOR and FETCH FORWARD. It could be worse - a previous version of VisiData ran a count(*) on all tables thinking this is a fast operation. Visidata likes to count the columns for all tables and information_lumns is not yet optimized in YugabyteDB. Especially if you use my connection string above, which goes to a free VM of mine with limited resources. The PGOPTIONS is a workaroud for issue #7745. This is why I installed psycopg2, the PostgreSQL driver for Python, which can connect to PostgreSQL or YugabyteDB: ![]() Reading files is cool, but I can query a database with VisiData. But don't worry: you are working on sheets, you are not modifying the original data. In case of mistakes, shift- U is the undo and shift- R the redo. Sheets have a name ( e to rename in the sheet list) and a number (ALT and the number goes directly to it) And I have already used g_ where _ would have resized the current column only. And you go to the last column with gl (the current column is highlighted in the first row). For example gj will go to the last row (as G), or g/ whill search on all columns where / searches on the current column. The g prefix is a more-global modifier for many commands. But you can still find it in the trash bin, visible with gS. You can close all sheets, and then quit the program immediately, with Ctrl- q or gq.ĭ usually deletes a row, and in the sheet list ( Shift-S) it removes the sheet. Many keys look like Vim ones, but no 'Esc' here (and no ':wq' either). You can quit a sheet with q and then land into the parent one, and typing q multiple times is a way to quit the program. You can see all sheets with shift- S and there ENTER goes to the sheet (not creating a new one as usual). If I go to version_metadata.json (navigate with arrow keys or h, j, k, l) and hit ENTER I can see the content:ĮNTER has opened a new sheet. I have a JSON file here and, of course vd can read it (like most data text files as csv, xls, xml, json.). For example, I’m in the directory where I installed YugabyteDB and run vd and see the files in the directories, like this (after typing g_ ) to adjust the width of columns: If you run a simple vd you will see the files in your directory. I've added psycopg2 (and then postgresql-devel) because I'll access to a YugabyteDB database which is accessed with the PostgreSQL driver as it is fully compatible (protocol, SQL and PL/pgSQL, Open Source license.) and lxml to read some html directly from their url. Enter fullscreen mode Exit fullscreen mode
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