1
vote
2answers
194 views

Should I stop an awfully inefficient MySQL DELETE statement?

I'm running the following statement on MySQL 5.5 in a 1GB 1CPU SSD virtual machine from Linode: DELETE table FROM ( SELECT MAX(id) id, field FROM table GROUP BY field ) temp_table INNER ...
2
votes
2answers
107 views

Execution plan has TOP operator for query without TOP or ORDER BY

I have product sales by month temporary table.(subset of much larger historical table) I'm running query to find new product not previously sold in the previous months for a specified 6 month range. ...
0
votes
1answer
30 views

How do I figure TOTAL DURATION for specific group

I have a table with CARD # and REDEEMED DATE. I am trying to figure out the total duration (in minutes) for each CARD #. I am using Microsoft SQL Server 2014
1
vote
3answers
439 views

How can I join two tables of an Oracle database containing all rows (not the intersection)

I have a Oracle database with a table t1 with: cod | text1 ----------- 1 | aaa 2 | bbb 3 | ccc table t2 with: cod | text2 ----------- 2 | abc 4 | mlc 5 | asc how can I optain ...
0
votes
2answers
79 views

Extrapolating gaps in hourly data

I have data in the form of DateTime -- Status -- Duration Seconds 12:00:00, Available, 10800 15:00:00, Unavailable, 460 I need to translate that into DateTime -- Status 12:00:00, ...
-1
votes
2answers
27 views

Users unable to access Database

we have an SQL Server called sql01. On this,we have attached a number of databases, including the SSRS report server, which people can access. I have created a new database called ToolingSystem and ...
1
vote
2answers
60 views

Restrict Full access to certain User of Database

The scenario is the following: Given SQL Server Instance created and handled not by me Creation of Database and User on given Instance by me Question: To my limited understanding, the sa login ...
0
votes
0answers
20 views

SQLAnywhere: How to import empty columns (date)

After unloading from a database I've got inside my reload.sql something like that: INPUT INTO "dbo"."mytable" FROM '/tmp/316.dat' FORMAT ASCII BY ORDER; The table is defined as something like that: ...
4
votes
1answer
696 views

Hiding a SQL Server vs Turning Off SQL Browser

Can anyone explain the difference between turning off the SQL Browser service and Hiding an instance through the SQL Server Configuration Manager? I've always assumed they do the same thing and have ...
3
votes
2answers
647 views

What is the difference between Used and Allocated space?

I am learning Database operations and I have found a couple of resources online that have given me a loose understanding, but I still couldn't explain the difference myself. Explain like I am five ...
7
votes
1answer
119 views

Two servers, different execution plans. Several orders of magnitude difference in run time

Two servers, Development and Live. Live server is an Amazon RDS SQL Server Web instance. Both servers have identical schema and data. There is a good spatial index on the geometry column. On my ...
8
votes
1answer
174 views

Overcome MERGE JOIN(INDEX SCAN) with explicit single KEY value on a FOREIGN KEY

Added 7/11 The issue is deadlocks occur because of index scan during MERGE JOIN. In this case a transaction trying to get S lock on the whole index at the FK parent table, but previously another ...
1
vote
0answers
29 views

ANY in postgresql gives weird error

when I do: SELECT ARRAY[4] I get array integer[] ------ {4} and if I do: select * from b where b.ID = ANY (array [4]) That works. Now, something else: select array_agg(4) I get: ...
2
votes
1answer
300 views

How to resolve foreign key references across different databases (iSeries and SQL Server)

I've got a system that has a DB2 iSeries database. We are rewriting a portion of the system and implementing it using SQL Server and Entity Framework. Originally, I was lead to believe that there ...
1
vote
1answer
46 views

MS SQL Server Incremental(differential) backup interrupted due to Full backup

I have a manual full backup happening every night, post which I am taking differential backup after every hour but after three to four differential backups a full backup happened through third party ...
3
votes
1answer
242 views

Error while restoring Postgres DB Dump

Using below command to restore the database Restoration command: cat my_db_dump.sql.gz | gunzip | psql -d new_database -U my_username Note: my_db_dump.sql.gz size is 4.5 GB, (extracted size will ...
1
vote
1answer
82 views

Why this statement invalid: `VALUES ( CURRENT PACKAGESET )`?

I'm on db2 luw 10.5. db2 special registers can be set with: SET CURRENT ... and retrieved with: VALUES CURRENT ... with the exception of CURRENT PACKAGESET. For some reason the following ...
2
votes
1answer
222 views

Oracle Ref Partitioning: Deadlock due to child table row migration

My ordering application uses Oracle 11g Database. This DB has a primary table ORDERS and multiple child tables like ORDER_DETAILS, PLAN etc. ORDERS table is LIST partitioned on STATUS column and all ...
2
votes
1answer
136 views

Split field values using specific character

Please help me with this. It is possible to split field values using a specific character? Here is my sample table value 10uF 2K 1.0uF 200UF I want it to split by this: value capacitance/...
1
vote
2answers
2k views

Add UNIQUE index fails with duplicate entry error, but no duplicates found

Given table: CREATE TABLE mytable ( field_a CHAR(15) NOT NULL DEFAULT '', field_b MEDIUMINT UNSIGNED NOT NULL DEFAULT 0, field_c SMALLINT UNSIGNED NOT NULL DEFAULT 0, field_d SMALLINT ...
2
votes
0answers
84 views

Mysql Match…against query performance in InnoDB Mysql 5.6

I need to search records in the table which contains millions of records. I have recently updated Mysql version from 5.1 to 5.6. I was using like in query which was taking around 15 sec to 30 sec. ...
-4
votes
1answer
3k views

No operator matches the given name and argument type(s). You might need to add explicit type casts [closed]

postgres=# select * from json_test; id | data ----+----------------------------------- 1 | {} 2 | {"a": 1} 3 | {"a": 2, "b":["C", "d"]} 4 | { "a":1, "b":{"c":...
2
votes
1answer
189 views

Mysql can't start?

Mysql can't start, here is the log : 150708 06:28:36 mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql 150708 6:28:36 [Warning] Using unique option prefix key_buffer instead of ...
1
vote
1answer
72 views

How can I improve this query in PostgreSQL?

I've been using PostgreSQL for a little over a year. I am continually whacked by queries that have counts in them, such as: SELECT COUNT(*) AS count_all, listings.id AS listings_id FROM "listings" ...
3
votes
1answer
416 views

MySQL - Where can I find metrics on the performance of Blob vs file system?

I know and understand that there are performance hits in storing blob data in the database, but the blob portion of the data is going to be rarely retrieved/viewed, it is for smaller data (the vast ...
8
votes
2answers
1k views

“Recheck Cond:” line in query plans with a bitmap index scan

This is a spin-off from comments to the previous question: Postgres 9.4.4 query takes forever Using PostgreSQL 9.4, there always seems to be a Recheck Cond: line after bitmap index scans in query ...
4
votes
1answer
516 views

Service Credentials to use in AlwaysOn Availability Groups?

When using AlwaysOn Availability Groups does each SQL Instance need to use the same service credentials? We are setting up a new SQL2014 deployment and will be using AlwaysOn. If I have 2 SQL servers ...
3
votes
1answer
28 views

SQL Server 2008 R2 lack of space?

I have upgraded from SQL Server 2005 to SQL Server 2008 R2 because my database was 4G and needed extra space. I though SQL Server 2008 R2 has a limit of 10Gigs hence I would have 6 Gigs free, however ...
1
vote
1answer
245 views

Postgres - window function rank and count

I have some tables that track athletes time around a track: competitions, competition_users and competition_user_sessions I am constructing a query that extracts the current rank and total no of ...
1
vote
0answers
83 views

Can PostgreSQL with synchronous streaming replication get behind on the WAL logs?

I have 2 Postgres 9.4 servers running on 2 identical VMs that I am using to learn how to setup replication before it gets used in production. Hot standby isn't required but it would be preferred. I ...
2
votes
1answer
1k views

Running SSRS and SSAS from different server than the primary database instance(SQL Server Engine)

Right now both SSRS, SSAS and SQL Server Engine are on the same server. We are using 2008R2 Enterprise. We are thinking to upgrade to SQL Server 2012 or 2014. and We want put on separate serve the ...
3
votes
1answer
198 views

Excessive CPU use in vendor SQL Server DB

Background: I've got a SQL Server 2012 DB provided by a vendor so modification of queries and tables is limited. We do own the DB though, so we can add and maintain indexes. Indexes haven't been ...
2
votes
1answer
46 views

Update query could not be bound

I'm trying to do a simple update query and I'm getting this error: The multi part identifier "customers.customer_name" could not be bound Query: Update Suppliers Set City = (select s.city ...
1
vote
2answers
45 views

Custom ORDER BY

Are there other ways to use ORDER on my results? 20150507094958A DISPOSED 2015-05-07 09:50:00.853 Samuel MONEY 20150507094958A DISPOSED 2015-05-22 09:25:00.000 Jeff AUTOMOBILES ...
0
votes
0answers
17 views

Can MySQL walk through the files of a directory?

Like the title says: can MySQL (alone, i.e. without C or Python) walk through the files of a directory? Or can you only do this through an API? Sorry for the dumb question. Total noob here and I ...
1
vote
4answers
91 views

Grouping Data Using Joined Tables with Certain Distinct Values

I am struggling to get my head around how to do this so please bare with me while I explain. We have an order system which records orders, order lines, items, users etc. What I am interested in in ...
1
vote
1answer
196 views

Optimizing Queries HAVING COUNT and INSERT…ON DUPLICATE KEY UPDATE

There are two main queries I'm tying to improve, one question is much more conceptual and learning about databases and another is much more straightforward. Both cases deal with the same table It has ...
3
votes
2answers
42 views

Query not recognize alias [duplicate]

I have the following query, the alias it's called DELAY, works fine, but when I try to run the first query adding AND DELAY < 0, the alias is not recognized. I tried to create the alias QUERY AS ...
2
votes
1answer
127 views

Upgrading SQL Server 2008 Standard to Enterprise

I'm trying to do the upgrade but when it asks me for the Product Key for the current version, I can't find it. When I go on the MSDN website for it, it says that a key is not necessary for this ...
3
votes
2answers
2k views

How to separate name string by the spaces in the name in T-SQL

I have a list of names, such as: Doe John James, Doe Jane and Doe Henry Albert Sr I need to split those out into the four component parts of the name (if the name has four parts) to put each of them ...
1
vote
1answer
160 views

How to grant access to IP range in Postgres?

I would like to configure my Postgres DB to be accessed by any IP 10.8.101.*. I know I have to create a rule in pg_hba.conf but I'm not sure what it should look like. My LAN IP is currently 10.8.101....
0
votes
1answer
333 views

DB2 Trigger Error : An unexpected token “OR INSERT” was found following SQLCODE=-104, SQLSTATE=42601, DRIVER=3.68.61

I am getting an error while executing the following queries. As per the DB2 documentation, we can have both update and insert event in the same trigger, but when I am trying to do so I am getting an ...
5
votes
2answers
11k views

How do I import XML to a SQL Server table?

Can anyone help me work towards fixing my solution to import my XML data into a SQL Server Table? I have done my research, but this task has been very hard for me to accomplish. Everything I have ...
1
vote
1answer
32 views

Index design question

This query runs for 60 seconds: SELECT mychecklis0, .... FROM dbo.MyChecklistStatus mychecklis0_ WHERE mychecklis0_.AppFormSubSectionId=@P0 AND mychecklis0_.ProfileId=@P1 There is an index created ...
1
vote
1answer
39 views

Problem locating rows with dynamic SQL

I'm new at SQL in general, so I'm have a few problems with some of my stored procedures I'm designing. My procedure takes in 3 parameters. A location (or table name basically, a varchar), a room ...
0
votes
1answer
106 views

SSAS (Analysis Services) 2014 - Cumulative Update 1 for SP1

I just recently applied CU1 for SQL Server 2014 SP1 (http://support.microsoft.com/en-us/kb/3067839) to my development workstation and one PROD server. Analysis Services continues to report itself as ...
1
vote
3answers
416 views

Sparse matrix - key-value db?

I have a huge sparse matrix ( 10^9 rows, 10^6 cols, density < 0.03% ), where each row has at least one nonzero column, but some column may contain only zeros. The cells are decimal numbers > 0. I ...
4
votes
2answers
980 views

Unexpected gaps in IDENTITY column

I'm trying to generate unique purchase order numbers that start at 1 and increment by 1. I have a PONumber table created using this script: CREATE TABLE [dbo].[PONumbers] ( [PONumberPK] [int] ...
1
vote
1answer
434 views

How to create DBA user from oracle APEX 11gR2 XE

Please anyone tell me how to create DBA user from ORACLE Application express(http://127.0.0.1:8080/apex/apex_admin)? I installed Oracle 11gR2 XE on windows 8.1 PC and I am able to login to Oracle ...
1
vote
1answer
987 views

How to do a SELECT inside of a PIVOT [duplicate]

I am trying to SELECT values from a column in my database in order to perform a PIVOT on those values without hard-coding them. SELECT * FROM (SELECT ItemType, [Status] FROM [EVAULTTEST].[dbo]....

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