We Keep Coding

SQLlite3 Insert values to columns based on Where condition

I'm trying to insert values to new columns only for rows which answer a specific where condition (when a the value in Name column is equal to a given name).
This is the code I've written so far:
cours.execute("""INSERT INTO NewTable(Straight, Right, Left) WHERE Name = (?)
VALUES (?, ?, ?) """,
(name, DIRECTIONS['straight'], DIRECTIONS['right'], DIRECTIONS['left']))
conn.commit()
after I do the commit I get the following error:
sqlite3.OperationalError: near "WHERE": syntax error
Thanks.

Try with an UPDATE statement:
cours.execute("""UPDATE NewTable
SET Straight = ?, Right = ?, Left = ?
WHERE Name = ?""",
(DIRECTIONS['straight'], DIRECTIONS['right'], DIRECTIONS['left'], name))

Why is this sqlite3 UPDATE giving a syntax error?

I have a function that drops some tables and reinitializes a new set which are working fine, then when it updates the existing table with the following:
self.cursor.execute('''UPDATE beers1 SET (beer_name, og, fg, beer_desc, ibu, glass_type, keg_size)
VALUES (?,?,?,?,?,?,?) where id=1''',("Beer", 1, 1, "Delicious!", 0, "Pint Glass", 640))
Which then gives me:
OperationalError: near "(": syntax error
Any insight would be incredibly helpful. Thanks!

The standard SQL syntax for an UPDATE statement is either:
UPDATE beers1
SET (beer_name, og, fg, beer_desc, ibu, glass_type, keg_size) =
(?, ?, ?, ?, ?, ?, ?)
WHERE id = 1
Or:
UPDATE beers1
SET beer_name = ?, og = ?, fg = ?,
beer_desc = ?, ibu = ?, glass_type = ?, keg_size = ?
WHERE id = 1
You will need to check the SQLite3 manual to see which is supported by SQLite3. The second is almost guaranteed to be supported; the first may not be.

Pass variable into SQLAlchemy query

Trying to pass a variable (a set) into an sqlalchemy query.
Found this: How can I bind a list to a parameter in a custom query in sqlalchemy? But it requires you to know many items there are. The number of entries changes at any given moment.
My previous question went mostly unanswered unfortunately so I figured I'd re-iterate what I'm trying to do here.
Basically, I have this variable: sites = set(db1).intersection(db2) and I'm trying to pass it into this sql alchemy query:
'test': DBSession.query(A_School.cis_site_id.in_(sites)).all(),
But I get invalid syntax errors and invalid parameter type errors...I can't get this thing to do what I want it to do. DB1 and DB2 are, as you mightve guessed, 2 different databases.
db1 = cis_db.query(site.site_id).join(site_tag).filter(site_tag.tag_id.like(202)).all()
db2 = DBSession.query(A_School.cis_site_id).all()
Full error:
ProgrammingError: (ProgrammingError) ('Invalid parameter type. param-index=0 param-type=KeyedTuple', 'HY105') u'SELECT [A_School].cis_site_id IN (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?) AS anon_1
FROM [A_School]' ((14639,), (14709,), (14587,), (14966,), (14625,), (14589,), (15144,), (15171,) ... displaying 10 of 18 total bound parameter sets ... (15133,), (14036,))

KeyedTuple is the type of each row returned by SQLAlchemy when not querying one full model. You are making sets of keyed tuples, rather than sets of the single value in each tuple. Should look something like this instead:
db1 = set(x.site_id for x in cis_db.query(site.site_id).join(site_tag).filter(site_tag.tag_id.like(202)))
db2 = set(x.cis_site_id for x in DBSession.query(A_School.cis_site_id))
sites = db1.intersection(db2)
test = DBSession.query(A_School).filter(A_School.cis_site_id.in_(sites)).all()

Assuming you would like to load schools for the sites, how about you try:
DBSession.query(A_School).filter(A_School.cis_site_id.in_(sites)).all()
instead of:
DBSession.query(A_School.cis_site_id.in_(sites)).all()

How to use Python list comprehensions for sqlite table loading?

I'm a rookie at SQLite stuff, and a relative noob in Python. I'm collecting process instrument data for a demonstration application. I've written this code:
from DAQ_Util import *
from sqlite3 import *
print 'Setting up memory-resident SQL database...'
BenchDB = connect(':memory:')
DBTableSetup = BenchDB.cursor()
DBTableSetup.execute("create table ss2000 (timestamp, var1, var2, var3, var4, var5, var6, var7, var8, var9)")
DBTableSetup.close()
# Access data from SS2000 TDL Sensor
instReading = ss2000serialRead('192.168.1.121', 4001, 57)
print instReading
SS2000TabPopulate = BenchDB.cursor()
SS2000TabPopulate.execute("insert into ss2000 values (?, ?, ?, ?, ?, ?, ?, ?, ?, ?)",
[instReading(i) for i in instReading])
print '...Done'
The DAQ_Util module is a collection of routines for grabbing process data from instruments. ss2000serialRead is from DAQ_Util and brings in a list of data strings from such an instrument. Some data is reproduced below. All I'm trying to do is write this data to an sqlite table using a list comprehension. It's not working, and I don't know how to interpret the error msg, though I think folks who know more about Python then me may spot the error immediately, or so I hope... :o) A dump of the screen output follows:
$ python SQLite-test.py
Setting up memory-resident SQL database...
Try connecting to serial server...
['2012-08-05 16:52:49.548095', '20.0000', '0.0000', '13.5', '76.60', '8190', '1640', '240', '-13', '79.40']
Traceback (most recent call last):
File "SQLite-test.py", line 17, in <module>
[instReading(i) for i in instReading])
TypeError: 'list' object is not callable
$
Can someone please point out the error?
Thanks!
Thanks Ignacio, here's corrected code:
# Access data from SS2000 TDL Sensor
instReading = ss2000serialRead('192.168.1.121', 4001, 57)
print instReading
SS2000TabPopulate = BenchDB.cursor()
SS2000TabPopulate.execute("insert into ss2000 values (?, ?, ?, ?, ?, ?, ?, ?, ?, ?)",
instReading)
====
Red

instReading is already a sequence.
....execute(..., instReading)

Inserting tuple's elements to database

I have a tuple that i wanna store its elements, I'm trying to insert it as following and it gives the following error, what am i doing wrong ? records_to_be_inserted is the tuple that has 8 elements.
with self.connection:
cur = self.connection.cursor()
cur.executemany("INSERT INTO rehberim(names, phone, mobile, email, \
photo, address, note, date) VALUES(?, ?, ?, ?, ?, ?, ?, ?)", self.records_to_be_inserTed)
Traceback (most recent call last):
File "/home/tayfun/workspace/personal_guide/modules/mainwindow.py", line 57, in save_records
photo, address, note, date) VALUES(?, ?, ?, ?, ?, ?, ?, ?)", self.records_to_be_inserTed)
sqlite3.ProgrammingError: Incorrect number of bindings supplied. The current statement uses 8, and there are 0 supplied.

Note that the executemany is for inserting multiple rows, e.g.,
import sqlite3
""" the table structure is:
create table tab
a char(1),
b char(2),
c char(3)
)
"""
conn = sqlite3.connect('C:\\test.db')
stmt = "insert into tab (a, b, c) values (?, ?, ?)"
cur = conn.cursor()
## many rows
vals = [('1','2','3'), ('2','3','4'), ('3','4','5')]
cur.executemany(stmt, vals)
cur.close()
This will result in three rows in the database. If it is because you have multiple values in one query, you need to format it!
Edit: Added formatting with dictionaries
By using the following approach you do not need to consider the order of the values in the format call because the key in the dictionary is mapping the value into the {key_word} placeholder.
values = {'a' : 'value_a',
'b' : 'value_b'}
stmt = "insert into tab (col_a, col_b) values ({a}, {b})".format(**values)

The query must have all the data ready to be inserted.
You are calling a function in the query, which i guess you want that provides the data but that wont work.
You need to pass all the data in variables or locate them in the tuple index (like: tuple_name[1], tuple_name[4], etc.)
Example:
myTuple = ['a','b','c','d','e','f','g']
cur.executemany("INSERT INTO rehberim(names, phone, mobile, email, \
photo, address, note, date) VALUES({0}, {1}, {2}, {3}, {4}, {5}, {6}" .format (myTuple[1], myTuple[2], myTuple[3], myTuple[4], myTuple[5], myTuple[6], myTuple[7])