Tagged Questions

An acronym for "Structured Query Language" (it's not the name of a specific DBMS product), SQL can be used in relational database management systems (RDBMS) to query, update, delete, and insert data as well as modify the structure of the database. It can also be used to manage schemas and data ...

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0
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0answers
9 views

How to restrict access to current user record and its rights in postgres

Postgres 9 database contains additional information about postgres users: create table public.user ( user char(10) primary key, -- CURRENT_USER in postgres name char(30) ); and user roles; ...
-4
votes
0answers
30 views

Defining Role of Super Admin, Admin and User from DB table

I have a column in my sql table where I want to define the role of the user. If User is SuperAdmin its value will be -> 0. For Admins it will be -> 1 For Users it will be -> 2. Also. I have column ...
2
votes
2answers
31 views

Multiple Instance with different Service packs in Sql server

i would like to install Default Instance with version sql server 2008 R2 RTM and I want to install Another named instance with sql server 2008 R2 Sp2,Is this something possible?
4
votes
0answers
72 views

There is insufficient system memory in resource pool 'internal' to run this query

One of our production servers reporting error in log Error: 701, Severity: 17, State: 123. There is insufficient system memory in resource pool 'internal' to run this query. I searched for ...
0
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0answers
35 views

select sequential rows

How would I go about selecting a sequence of rows. Where every row in the sequence: Must only be 1 day apart ~ Thereby the whole sequence of rows must have sequential dates Must have a count higher ...
2
votes
1answer
19 views

Changing feature on a database that is a member of SQL Server AlwaysOn availability group

Our developers need a change on a database that is in the Availability group (they need Service broker in one of the databases to be enabled) but when I try to do it I am getting error saying that I ...
2
votes
3answers
46 views

Bulk Delete for Large Table in MySQL

I have a Notification table contains about 100 million rows host in Amazon RDS with 1000 IOPS, and I want to delete those rows older than one month. If I do DELETE FROM NOTIFICATION WHERE CreatedAt ...
0
votes
0answers
25 views

PL/SQL IDE like C++ compilers [on hold]

Are there IDEs out there like Codeblocks that can help debug syntax errors in PL/SQL scripts? I am currently using Oracle XE and trying to create a PL/SQL script.
1
vote
1answer
19 views

CONCAT() between different alphabet echoes out '&' ampersand

I want to concatenate different alphabet strings and get a weird latin encoding with ampersands after the sixth greek character (I want to concatenate greek and english alphabet strings). Lets say I ...
0
votes
2answers
47 views

How to use max function in such condition?

My query is select * from guestuser union select * from olduser ORDER BY userid DESC LIMIT 1; Is that correct query to find last userid from different table have different userid? can i change ...
0
votes
0answers
52 views

Query that can pick up data that falls between rows having unique parameter [on hold]

Suppose a table has data in the following format: Id Name ----------- Main Abc Check Def Check Ghi Main Jkl Check Mno Check ...
0
votes
0answers
21 views

Need some questions to show some trends [on hold]

I have a college project:create a database from a dataset and normalize it. I also have to do some trend and data analysis via sql queries, reports, etc. Please give me some interesting questions for ...
2
votes
1answer
35 views

I am Trying to Write an Access Query to Get a person having a First Name and Last Name but not all People having any of those names

I am using Microsoft Access. In my search form I have 3 text boxes that I enter text to search for: First Name; Last Name; Last 4 of SSN. With the current query when I enter text into multiple boxes ...
1
vote
0answers
15 views

MySQL - Transactions and causality

I'm new to MySQL's LOCK and TRANSACTION and have a question about different isolation levels of a transaction: Given two transactions executing the same code (auto-commit is false): (1) get data of ...
0
votes
0answers
53 views

Improving Statistics for Query Plan

I have a table with over 2.1 million rows. This table has a column rID, which joins to a PK on another table. As you can see from the distribution below, most rows contain a null for rID; which ...
0
votes
2answers
34 views

SQL: TSQL to Find invalid views

we have a Tuesday/Thursday Maint window for one application we support. On Tuesdays we modify one facility and thursday if there are no errors we roll all the changes out to the other facilities. The ...
2
votes
1answer
66 views

Database Implementations of ORDER BY in a Subquery [on hold]

I am using an application (MapServer - http://mapserver.org/) that wraps SQL statements, so that the ORDER BY statement is in the inner query. E.g. SELECT * FROM ( SELECT ID, GEOM, Name ...
-3
votes
1answer
18 views

Which is best tool for database backup file encryption? [on hold]

Which is best tool for database backup file encryption other than TDE and inbuilt feature of SQL server 2014. I want to do as follows, Take a database backup in SQL Server Encrypt with third party ...
-1
votes
0answers
32 views

SQL Server is very slow [on hold]

In company with 30 clients(computers), after 3-4 hours working with financial software, SQL Server is very slow SQL Server can not free used memory and the query execution time is very slow but after ...
0
votes
0answers
26 views

Time based trigger for database update [on hold]

I have a database table in SQL Server as following ID | Name | ExpireTime | CountLeft 1 test 11/11/2014 2:30 5 I want to update countLeft = 0 when ExpireTime = currenttime ...
0
votes
1answer
24 views

Get Current Row and Next Row [on hold]

I want to design a query which gets the row of where clause and the next row in the table of the where clause. I am looking for something like select column a, next row in table from table where ...
-4
votes
0answers
16 views

SQL Procedure of signing up [on hold]

If the database needs to store an e-mail and password of each user using a procedure for signing up, how can the procedure be written?
1
vote
1answer
39 views

Join select queries on an id in SQL Server

I have three tables that SELECT from and I'd need to join the results. It feels like this should be a rather easy task but I struggle with the syntax. Working on Microsoft SQL Server Enterprise ...
0
votes
1answer
37 views

Insert values in table from front-end CategoryId

I want to add a value from front end into a table. I want to do it in asp.net. I have a table which is as below:- CategoryId int CategoryName nvarchar(50) not null ParentId ...
0
votes
0answers
20 views

Left Outer Joins in Access

I'm working on an existing Access database trying to implement some changes which will allow the estimation of cutting times for my employer (We're an industrial company who fabricate Flight Cases). ...
0
votes
1answer
22 views

Multiple left join hangs server

i've got problem with left join query. It connect's 3 tables and calculate sales value for categories. Query: SELECT categories.name, categories.id, ...
0
votes
0answers
16 views

INSERT missing FK rows at the same time

I found on this site the following SQL-Query to perform an insert (see this post): WITH sel AS ( SELECT val.description, val.type, f.id AS foo_id FROM ( VALUES ('testing', ...
0
votes
0answers
17 views

change display of rows into column using PIVOT in sql server [migrated]

This is my query: select d.disposition, count(a.serialnumber) AS SUBTOTAL FROM FADB a, FARepair b, Disposition d WHERE a.ID = b.ID AND b.DispositionID = d.DispositionID GROUP BY d.Disposition and ...
0
votes
0answers
11 views

Installing printer_php.dll onto an azure website

Has anyone been able to get this extension running on a php based azure website? The extension just basically allows you to print stuff with your printer. I've configured my php.ini to find the ...
0
votes
2answers
30 views

SQL Performance: COUNT or extra attribute?

If I want to count the number of a multivalued attribute, which way is faster: a) using COUNT(attribute) on a whole table or b) adding an extra attribute which counts these stored values (to be ...
0
votes
1answer
29 views

How to design a query that gives count of different parameters based on different condition from a single table

I have a table books containing columns as bookid, issue_date,return_date. Once a book is issued from library an issue_date corresponding to it is made into the table while return_date can have valid ...
0
votes
1answer
21 views

SQL: return values as column table

I am running this query to get all returns for a list of tickers: select return1 from STOCK_DATA where TDATE between 20130101 and 20131231 and TICKER in (SELECT DISTINCT TICKER FROM STOCK_DATA) ...
0
votes
0answers
36 views

Table design for optimum performance

For example let's say I have to create a table called Employee with columns EmployeeID, Name, DOB, Address, DepartmentID[FK]. So I create the table as follows with a primary key and a nonclustered ...
0
votes
1answer
16 views

Mysql pagination without offset

Let's assume I have got a table with these data: I want to order it by createdAt column DESC, and id column DESC select id, createdAt from post order by createdAt desc, id desc Now it looks like ...
0
votes
1answer
32 views

where in (sub query) vs join

just want to ask about how to optimize my query. because i feel efficiency using join instead of "where in" sub query can someone enplane the deference SELECT C.Customer_id, C.tran_id, ...
0
votes
0answers
28 views

MySQL: How to get all values in “TICKER” column`? [migrated]

I never used SQL before, I want to get all values in "TICKER" from this database: The first statement select TDATE, price, return1 from STOCK_DATA where TDATE < 20131231 and TDATE > ...
-1
votes
0answers
12 views

Template for MySQL database upgrade script

What is the equivalent of this Microsoft SQL Server upgrade script template for MySQL? I want to upgrade my database version in repeatable transactions in sequential scripts as I develop an ...
-1
votes
3answers
52 views

What is wrong with this INSERT Statement

I am trying to use this statement to insert new data into my orders table like so: $tsql2 = "INSERT INTO pedidos (numero_local, emailUser,codigopapel,cantidad, color) VALUES ('$local', '$emailOn', ...
1
vote
3answers
49 views

does the mere existence of a primary key increase query speed for large data sets?

So, I have a table with about 2.4M rows and ~30 columns. There is no unique column within the data. The data is transaction logs from stores where each transaction number is only unique on a per store ...
0
votes
0answers
28 views

Secondary File Group is not online in SQL Server

In my database there are two file groups PRIMARY and SECONDARY. The .ndf file is in SECONDARY file group. I just wanted to backup only the secondary file group. So ran following T-SQL... BACKUP ...
5
votes
3answers
94 views

Most cost efficient way to page through a poorly ordered table?

I have a table that has three columns: HashUID1, HashUID2, Address_Name (which is a textual email address, and the previous two hash colunms are of some crazy creation to link event participant tables ...
1
vote
0answers
25 views

Handling SQL updates for production deploys

I'm researching for quite a long time now (about two months) and haven't found a good approach for this, so I'll ask you experts out there in the hope of some enlightenment. I run a pretty ...
1
vote
2answers
64 views

TSQL substitute for MAX() string ranking

I have a table with repeating values (col1) and I need to return col2 based on a ranking system. In my example the ranking system is handled by MAX() giving me the highest value. I then return the ...
0
votes
0answers
4 views

SQL Server 2008 R2 - Replication - Multiple Publications on a single database

I have hit a problem and I need an idea of where to look or how to resolve. I have setup a publication and 2 subscriptions to it, 1 running on a schedule and the other running continuously. I need ...
0
votes
0answers
27 views

Horizontal scaling for Sql and No-sql, Its advantages and disadvantages [closed]

I'm exploring horizontal scaling for sql and no-sql. I've experience in setting up master-slave/master-master for mysql, Also had setup Replication with 3 nodes for Mongodb. I would like to know more ...
0
votes
0answers
39 views

Thoughts on further optimizations

So I have this application. It runs on a server. There is a portion of the code that is taking around 10-15 seconds to run, it contains some queries, logic, as well as some code to update the ...
1
vote
3answers
81 views

Clustered Index improvemens for particular queries

I found a table that looks like this: CREATE TABLE [dbo].Table1 ( id INT primary key IDENTITY (1, 1), [idUser] INT NOT NULL , [Amount] INT NOT NULL , [Attempts] INT NOT NULL , ...
3
votes
4answers
257 views

Keep track of time intensive stored procedure with prints

I am no database admin nor is my SQL-foo any good (yet), but have a few tasks to get done in MSSQL, and one is a rather time intensive procedure where I fetch from a CURSOR and WHILE @@FETCH_STATUS = ...
-2
votes
0answers
33 views

Correctly creating a temporary local table in a SQL Server procedure [closed]

I need a temporary table to use in a stored procedure with a single column ID. Something like.. DECLARE TempIDs TABLE ( ID int ); What I do not understand is that local variables begin with an ...
1
vote
1answer
22 views

MAX (id) function with MySQli

How can I use the following statement to return only the record with the maximum PersonID from the table? /* Create the prepared statement */ if ($stmt = $mysqli->prepare("SELECT Max(PersonID) AS ...