sql2csv¶
Description¶
Executes arbitrary commands against a SQL database and outputs the results as a CSV:
usage: sql2csv [-h] [-v] [-l] [--db CONNECTION_STRING] [-q QUERY] [-H] [FILE]
Execute an SQL query on a database and output the result to a CSV file.
positional arguments:
FILE The file to use as SQL query. If both FILE and QUERY
are omitted, query will be read from STDIN.
optional arguments:
-h, --help show this help message and exit
-v, --verbose Print detailed tracebacks when errors occur.
-l, --linenumbers Insert a column of line numbers at the front of the
output. Useful when piping to grep or as a simple
primary key.
--db CONNECTION_STRING
An sqlalchemy connection string to connect to a
database.
--query QUERY
The SQL query to execute. If specified, it overrides
FILE and STDIN.
-H, --no-header-row Do not output column names.
Examples¶
Load sample data into a table using csvsql and then query it using sql2csv:
$ csvsql --db "sqlite:///dummy.db" --table "test" --insert examples/dummy.csv
$ sql2csv --db "sqlite:///dummy.db" --query "select * from test"
Load data about financial aid recipients into Postgresql. Then find the three states that received the most, while also filtering out empty rows:
$ createdb recipients
$ csvsql --db "postgresql:///recipients" --table "fy09" --insert examples/realdata/FY09_EDU_Recipients_by_State.csv
$ sql2csv --db "postgresql:///recipients" --query "select * from fy09 where \"State Name\" != '' order by fy09.\"TOTAL\" limit 3"
You can even use it as a simple SQL calculator (in this example an in-memory sqlite database is used as the default):
$ sql2csv --query "select 300 * 47 % 14 * 27 + 7000"