I'm trying to run the following PHP script to do a simple database query:
$db_host = "localhost";
$db_name = "showfinder";
$username = "user";
$password = "password";
$dbconn = pg_connect("host=$db_host dbname=$db_name user=$username password=$password")
or die('Could not connect: ' . pg_last_error());
$query = 'SELECT * FROM sf_bands LIMIT 10';
$result = pg_query($query) or die('Query failed: ' . pg_last_error());
This produces the following error:
Query failed: ERROR: relation "sf_bands" does not exist
In all the examples I can find where someone gets an error stating the relation does not exist, it's because they use uppercase letters in their table name. My table name does not have uppercase letters. Is there a way to query my table without including the database name, i.e. showfinder.sf_bands?
From what I've read, this error means that you're not referencing the table name correctly. One common reason is that the table is defined with a mixed-case spelling, and you're trying to query it with all lower-case.
In other words, the following fails:
CREATE TABLE "SF_Bands" ( ... );
SELECT * FROM sf_bands; -- ERROR!
Use double-quotes to delimit identifiers so you can use the specific mixed-case spelling as the table is defined.
SELECT * FROM "SF_Bands";
Re your comment, you can add a schema to the "search_path" so that when you reference a table name without qualifying its schema, the query will match that table name by checked each schema in order. Just like PATH in the shell or include_path in PHP, etc. You can check your current schema search path:
SHOW search_path
"$user",public
You can change your schema search path:
SET search_path TO showfinder,public;
See also http://www.postgresql.org/docs/8.3/static/ddl-schemas.html
I had problems with this and this is the story (sad but true) :
If your table name is all lower case like : accounts
you can use: select * from AcCounTs and it will work fine
If your table name is all lower case like : accounts
The following will fail:
select * from "AcCounTs"
If your table name is mixed case like : Accounts
The following will fail:
select * from accounts
If your table name is mixed case like : Accounts
The following will work OK:
select * from "Accounts"
I dont like remembering useless stuff like this but you have to ;)
Postgres process query different from other RDMS. Put schema name in double quote before your table name like this, "SCHEMA_NAME"."SF_Bands"
Put the dbname parameter in your connection string. It works for me while everything else failed.
Also when doing the select, specify the your_schema.your_table like this:
select * from my_schema.your_table
If a table name contains underscores or upper case, you need to surround it in double-quotes.
SELECT * from "Table_Name";
I had a similar problem on OSX but tried to play around with double and single quotes. For your case, you could try something like this
$query = 'SELECT * FROM "sf_bands"'; // NOTE: double quotes on "sf_Bands"
This is realy helpfull
SET search_path TO schema,public;
I digged this issues more, and found out about how to set this "search_path" by defoult for a new user in current database.
Open DataBase Properties then open Sheet "Variables"
and simply add this variable for your user with actual value.
So now your user will get this schema_name by defoult and you could use tableName without schemaName.
You must write schema name and table name in qutotation mark. As below:
select * from "schemaName"."tableName";
I had the same issue as above and I am using PostgreSQL 10.5.
I tried everything as above but nothing seems to be working.
Then I closed the pgadmin and opened a session for the PSQL terminal.
Logged into the PSQL and connected to the database and schema respectively :
\c <DATABASE_NAME>;
set search_path to <SCHEMA_NAME>;
Then, restarted the pgadmin console and then I was able to work without issue in the query-tool of the pagadmin.
For me the problem was, that I had used a query to that particular table while Django was initialized. Of course it will then throw an error, because those tables did not exist. In my case, it was a get_or_create method within a admin.py file, that was executed whenever the software ran any kind of operation (in this case the migration). Hope that helps someone.
In addition to Bill Karwin's answer =>
Yes, you should surround the table name with double quotes. However, be aware that most probably php will not allow you to just write simply:
$query = "SELECT * FROM "SF_Bands"";
Instead, you should use single quotes while surrounding the query as sav said.
$query = 'SELECT * FROM "SF_Bands"';
You have to add the schema first e.g.
SELECT * FROM place.user_place;
If you don't want to add that in all queries then try this:
SET search_path TO place;
Now it will works:
SELECT * FROM user_place;
Easiest workaround is Just change the table name and all column names to lowercase and your issue will be resolved.
For example:
Change Table_Name to table_name and
Change ColumnName to columnname
It might be silly for a few, but in my case - once I created the table I could able to query the table on the same session, but if I relogin with new session table does not exits.
Then I used commit just after creating the table and now I could able to find and query the table in the new session as well. Like this:
select * from my_schema.my_tbl;
Hope this would help a few.
Make sure that Table name doesn't contain any trailing whitespaces
Try this: SCHEMA_NAME.TABLE_NAME
I'd suggest checking if you run the migrations or if the table exists in the database.
I tried every good answer ( upvote > 10) but not works.
I met this problem in pgAdmin4.
so my solution is quite simple:
find the target table / scheme.
mouse right click, and click: query-tool
in this new query tool window, you can run your SQL without specifying set search_path to <SCHEMA_NAME>;
you can see the result:
I've been attempting to increase my knowledge and trying out some challenges. I've been going at this for a solid two weeks now finished most of the challenge but this one part remains. The error is shown below, what am i not understanding?
Error in sqlite query: update users set last_browser= 'mozilla' + select sql from sqlite_master'', last_time= '13-04-2019' where id = '14'
edited for clarity:
I'm trying a CTF challenge and I'm completely new to this kind of thing so I'm learning as I go. There is a login page with test credentials we can use for obtaining many of the flags. I have obtained most of the flags and this is the last one that remains.
After I login on the webapp with the provided test credentials, the following messages appear: this link
The question for the flag is "What value is hidden in the database table secret?"
So from the previous image, I have attempted to use sql injection to obtain value. This is done by using burp suite and attempting to inject through the user-agent.
I have gone through trying to use many variants of the injection attempt shown above. Im struggling to find out where I am going wrong, especially since the second single-quote is added automatically in the query. I've gone through the sqlite documentation and examples of sql injection, but I cannot sem to understand what I am doing wrong or how to get that to work.
A subquery such as select sql from sqlite_master should be enclosed in brackets.
So you'd want
update user set last_browser= 'mozilla' + (select sql from sqlite_master''), last_time= '13-04-2019' where id = '14';
Although I don't think that will achieve what you want, which isn't clear. A simple test results in :-
You may want a concatenation of the strings, so instead of + use ||. e.g.
update user set last_browser= 'mozilla' || (select sql from sqlite_master''), last_time= '13-04-2019' where id = '14';
In which case you'd get something like :-
Thanks for everyone's input, I've worked this out.
The sql query was set up like this:
update users set last_browser= '$user-agent', last_time= '$current_date' where id = '$id_of_user'
edited user-agent with burp suite to be:
Mozilla', last_browser=(select sql from sqlite_master where type='table' limit 0,1), last_time='13-04-2019
Iterated with that found all tables and columns and flags. Rather time consuming but could not find a way to optimise.
I have encountered a strange situation in DB2 UDB V11.
When I run SELECT COUNT(*) FROM view_name it returns 0 rows.
However, when I run SELECT * FROM *view_name* the data is returned properly.
I have tried dropping and re-creating the view and ran REORG and RUNSTAT on the underlying table.
Have anyone seen this situation before?
I have seen this before when a MQT was involved. Because the optimizer will use the best way to query and can rewrite it to use the MQT this situation could happen when the MQT has not been refreshed but the table itsef has been updated/deleted already.
So check if any MQTs are involved.
I am using table adapter Query configuration wizard in Visual studio 2013 for getting data from my database. For some queries like this:
SELECT *
FROM ItemsTable
ORDER BY date_of_creation desc, time_of_creation desc
OFFSET (#PageNumber - 1) * #RowsPerPage ROWS
FETCH NEXT #RowsPerPage ROWS ONLY
it doesn't recognize the #pageNumber as a paremeter and it cannot generate function that has these arguments while it works fine for queries like:
Select Top (#count) * from items_table
Why does in first query tableadapter fail to generate function with mentioned arguments whereas it can generate function fine for second one for example: tableadapter.getDataByCount(?int count)
Am I forced to use stored procedure, if yes since I don't know anything about it how?
Update: The Problem exactly occurs in TableAdapter Configuration Wizard in DataSet editor (VS 2013) and it doesn't generate functions with these parameters some times it says #RowsPerPage should be declared! but it should generate a function with this arguments I found that it happens when we don't use #parameter_name in clause other than SELECT and WHERE for example in this query we used the, in Offset clause.
I can't tell you how to fix it in ASP, but here is a simple stored procedure that should do the same thing:
CREATE PROCEDURE dbo.ReturnPageOfItems
(
#pageNumber INT,
#rowsPerPage INT
)
AS
BEGIN;
SELECT *
FROM dbo.ItemsTable
ORDER BY date_of_creation desc,
time_of_creation desc
OFFSET (#pageNumber - 1) * #rowsperpage ROWS
FETCH NEXT #rowsPerPage ROWS ONLY;
END;
This will also perform better than simply passing the query, because SQL Server will take advantage of the cached query plan created for the procedure on its first execution. It is best practice not to use SELECT *, as that can cause maintenance trouble for you if there are schema changes to the table(s) involved, so I encourage you to spell out the columns in which you're actually interested. The documentation for the CREATE PROCEDURE command is available here, and it spells out the many various options you have in greater detail. However, the code above should work fine as is.
If you need to grant access to your application user so they can use this proc, that code is
GRANT EXECUTE ON OBJECT::dbo.ReturnPageOfItems TO userName;
I have a question on creating running totals in MS Access 2010 similar to the one here:
Access 2010 - query showing running total for multiple records, dropping old record and adding new record on each line
However when I input the equivalent code from that thread I get an error saying that the database cannot be found (Access seems to think the table I have specified is the database name)
Here is the code from the original thread:-
SELECT hbep1.EmployeeID, hbep1.PayPeriodID,
(
SELECT Sum(hbep2.HoursUsed)
FROM Hours_by_Empl_PP hbep2
WHERE hbep2.EmployeeID=hbep1.EmployeeID
AND (hbep2.PayPeriodID Between hbep1.[PayPeriodID]-3
And hbep1.[PayPeriodID])
) AS Sum_of_Hours_last_4_PPs
FROM Hours_by_Empl_PP hbep1;
Here is the code I inputted into my query:-
SELECT
V4_Try.ID_NIS_INV_HDR,
V4_Try.ID_ITM,
V4_Try.RunTot3,
V4_Try.BomVsActQty,
DMin("RunTot3","V4_Try","[ID_Itm]=" & [ID_ITM]) AS IDItmMin,
DMax("RunTot3","V4_Try","[ID_Itm]=" & [ID_ITM]) AS IDItmMax,
(
SELECT Sum([V4_Try].[BomVsActQty])
FROM [V4_Try].[BomVsActQty]
WHERE [V4_Try].[ID_ITM]=[V4_Try].[ID_ITM]
AND (IDItmMax < IDItmMin)
) AS RunTot6
FROM V4_Try
ORDER BY V4_Try.ID_ITM, V4_Try.RunTot3;
One thing I notice is that the main query uses DMax() and DMin() to create some aliased columns
...
DMin("RunTot3","V4_Try","[ID_Itm]=" & [ID_ITM]) AS IDItmMin,
DMax("RunTot3","V4_Try","[ID_Itm]=" & [ID_ITM]) AS IDItmMax,
...
and then the subquery tries to use those aliases in its WHERE clause
(
SELECT ...
WHERE...
AND (IDItmMax < IDItmMin)
) AS RunTot6
I'm pretty sure that the subquery will have no knowledge of the column aliases in the "parent" query, so they may be the items that are unrecognized.
Start by running this query:
SELECT * FROM V4_Try;
Then develop for complexity. Build the nested query before anything else. When you know that runs, try adding your aliases, then the DMax() function, and so on. Isolate the point at which you have an error popping up.
This is the process to fix a query.
Oh, and please specify the precise error that is raised by Access. Also, if this is being run from VBA, please let us know because that affects your trouble-shooting.