I am new to this postGIS concepts.. I have an postgres table in that i have some 10000 datas.Now i want to update some 100 datas in that table. I have this 100 datas in CSV file. SO i used the following query:
CREATE TEMP TABLE tmp_x AS SELECT * FROM xxxxx LIMIT 0;
UPDATE xxxxxx
SET latitude = tmp_x.latitude
USING tmp_x
WHERE xxxxxxxx.id = tmp_x.id;
But its showing error:
ERROR: syntax error at or near "USING"
LINE 3: USING tmp_x
What wrong with above query.Help me to solve this..Thanks in advance..
Just a little syntax error. Should be "from" not "using".
UPDATE xxxxxx
SET latitude = tmp_x.latitude
FROM tmp_x
WHERE xxxxxxxx.id = tmp_x.id;
Related
I'm using psycopg2 to query a database that starts with a number + ".district", so my code goes like:
number = 2345
cur = conn.cursor()
myquery = """ SELECT *
FROM {0}.districts
;""".format(number)
cur.execute("""{0};""".format(query))
data = cur.fetchall()
conn.close()
And i keep receiving the following psycopg2 error..
psycopg2.ProgrammingError: syntax error at or near "2345."
LINE 1: SELECT * FROM 2345.districts...
Thought it was the type of data the problem, maybe int(number) or str(number)..but no, same error appears.
¿ What am i doing wrong ?
The way you are trying to use to pass parameters is not supported. Please read the docs.
I want to insert a query string into a Postgres database column in the following format
{"enrolled_time":'''SELECT DISTINCT enrolled_time AT TIME ZONE %s FROM alluser'''}
I try this:
UPDATE reports SET raw_query = {"enrolled_time":'''SELECT DISTINCT enrolled_time AT TIME ZONE %s FROM alluser'''} WHERE id=37;
It gives error like
ERROR: syntax error at or near "{"
LINE 1: UPDATE base_reports SET extra_query = {"enrolled_time":'''SE...
When I try using single quotes it throws error like following:
ERROR: syntax error at or near "SELECT"
LINE 1: ...DATE reports SET raw_query = '{"enrolled_time":'''SELECT DIS...
How can I overcome this situation
Use dollar quoting:
UPDATE reports
SET raw_query = $${"enrolled_time":'''SELECT DISTINCT enrolled_time AT TIME ZONE %s FROM alluser'''}$$
WHERE id = 37;
I am working with the script below.
If I change the script so I avoid the bytea datatype, I can easily copy data from my postgres table into a python variable.
But if the data is in a bytea postgres column, I encounter a strange object called memory which confuses me.
Here is the script which I run against anaconda python 3.5.2:
# bytea.py
import sqlalchemy
# I should create a conn
db_s = 'postgres://dan:dan#127.0.0.1/dan'
conn = sqlalchemy.create_engine(db_s).connect()
sql_s = "drop table if exists dropme"
conn.execute(sql_s)
sql_s = "create table dropme(c1 bytea)"
conn.execute(sql_s)
sql_s = "insert into dropme(c1)values( cast('hello' AS bytea) );"
conn.execute(sql_s)
sql_s = "select c1 from dropme limit 1"
result = conn.execute(sql_s)
print(result)
# <sqlalchemy.engine.result.ResultProxy object at 0x7fcbccdade80>
for row in result:
print(row['c1'])
# <memory at 0x7f4c125a6c48>
How to get the data which is inside of memory at 0x7f4c125a6c48 ?
You can cast it use python bytes()
for row in result:
print(bytes(row['c1']))
I'm fairly new to postgres. I am trying to copy over a file from my computer to a postgres server. I first initialize the table with
CREATE TABLE coredb (
id text, lng numeric(6,4), lat numeric(6,4),
score1 numeric(5,4), score2 numeric(5,4));
And my CSV looks like this:
ID lng lat score1 score2
1 -72.298 43.218 0.561 0.894
2 -72.298 43.218 0.472 0.970
3 -72.285 43.250 0.322 0.959
4 -72.285 43.250 0.370 0.934
5 -72.325 43.173 0.099 0.976
6 -72.325 43.173 0.099 0.985
However, when I try to copy the CSV over, I get the following error
COPY coredb FROM '/home/usr/Documents/filefordb.csv' DELIMITER ',' CSV;
ERROR: invalid input syntax for type numeric: "lng"
CONTEXT: COPY nhcore, line 1, column lng: "lng"
Oddly enough the csv imports just fine when I set the CREATE TABLE parameters to text for all the columns. Could someone explain why this is happening? I am using psql 9.4.1
You have to use HEADER true to tell COPY to skip the header line.
I have a database in postgreSQL. I want to read some data from there, but I get an error (column anganridref does not exist) when I execute my command.
Here is my NpgsqlCommand:
cmd.CommandText = "select * from angebot,angebotstatus,anrede where anrid=anganridref and anstaid=anganstaidref";
and my 3 tables
the names of my columns are rights. So I don't understand why that error comes. Someone can explain me why it does crash? Its not the problem of large and lowercase.
You are not prefixing your column names in the where clause:
select *
from angebot,
angebotstatus,
anrede
where anrid = anganridref <-- missing tablenames for the columns
and anstaid = anganstaidre
It's also recommended to use an explicit JOIN instead of the old SQL 89 implicit join syntax:
select *
from angebot
join angebotstatus on angebot.aaaa = angebotstatus.bbbb
join anrede on angebot.aaaa = anrede.bbbb