Unverified Commit 3d228362 authored by Mike Fiedler's avatar Mike Fiedler
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Signed-off-by: default avatarMike Fiedler <miketheman@gmail.com>
parent bb3e1666
......@@ -132,8 +132,8 @@ Postgresql
Create Tables
=============
Tables are organized into rows and columns.
Data is stored inside these tables.
Tables are organized into rows and columns.
Data is stored inside these tables.
In order to host this information we need to create a table.
We do this with the ``CREATE TABLE`` statement.
......@@ -166,11 +166,11 @@ For example, if you have a table called "Users" which contains Names and Address
.. code-block:: sql
ALTER TABLE Users ADD age int;
Standard Syntax is:
.. code-block:: sql
ALTER TABLE table_name ADD column_name datatype
If we need to modify a current table, we can also do so with the ``ALTER`` statement.
......@@ -467,13 +467,13 @@ Here is a simple example of a DELETE statement:
Pro Tips
========
- Before doing a write query, run it as a read query first to make sure you are retrieveing exactly what you want.
- Before doing a write query, run it as a read query first to make sure you are retrieveing exactly what you want.
If your query is:
``UPDATE users SET disabled=1 WHERE id=1;``
Run this first to validate you will be affecting the proper record:
``SELECT disabled FROM users WHERE id=1;``
- use a ``LIMIT`` on ``UPDATE`` and ``DELETE FROM`` queries to limit damage imposed by an erroneous query
......
......@@ -50,7 +50,7 @@ The `tail` command's `--follow` or `-f` flag is an extremely useful tool for vie
For example, if you were running a web server like nginx or Apache that was configured to send it's access log to a file, you could use tail to see new requests.
.. code-block:: bash
$ tail -f /var/log/nginx/access.log
127.0.0.1 - - [17/Aug/2013:02:53:42 -0700] "GET / HTTP/1.1" 200 151 "-" "curl/7.22.0 (x86_64-pc-linux-gnu) libcurl/7.22.0 OpenSSL/1.0.1"
127.0.0.1 - - [17/Aug/2013:02:53:43 -0700] "GET / HTTP/1.1" 200 151 "-" "curl/7.22.0 (x86_64-pc-linux-gnu) libcurl/7.22.0 OpenSSL/1.0.1"
......
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