3
votes
3answers
4k views

Problem with new MySQL Workbench connection

I'm working on Debian 8 and wanted to create database using MySQL Workbench. I did everything in this tutorial, but when I created a new MySQL Connection, the program returned: Failed to Connect ...
2
votes
0answers
249 views

operator class “gin_trgm_ops” does not accept data type tsvector

ALTER TABLE users ADD COLUMN full_text_vector TSVECTOR; CREATE INDEX full_text_index ON users USING gin(full_text_vector gin_trgm_ops); The last line is giving me the following error: SQLSTATE[...
1
vote
1answer
81 views

Product attribute schema design, mixing solutions

I am working on a product database in MySQL and the products can be multiple types with different attributes. The number of attributes and there datatype vary. I read about some design patterns (post) ...
4
votes
1answer
7k views

Benefits of SET TRANSACTION ISOLATION LEVEL READ UNCOMMITTED

I use SET TRANSACTION ISOLATION LEVEL READ UNCOMMITTED in the majority of my general SQL queries, mainly because this was drilled in to me when originally learning the language. From my understanding,...
2
votes
1answer
75 views

Multiple indices on a table

I have run SQL Profiler and I can see that I'm "missing" some indexes (non-clustered) on a table. How is it best to handle indexes that can be a "subset" of another index? Index 1 UserId, InstanceId,...
2
votes
1answer
84 views

Best way to backup mysql database?

How do you backup your mysql database so you can be sure that you are 100% protected of data loss whatever problems that may happen? I am thinking to rent one or two servers that i will use only for ...
3
votes
1answer
1k views

Why has my slave server stopped connecting to master in MySQL replication?

We have MySQL replication setup and it has been running without issue for some time. This server acts as a slave and a master (it replicates through to another server). This morning I received an ...
14
votes
4answers
2k views

Why should a key be made explicit?

I am very new to the subject of databases so this may sound ignorant, but I am curious why a key should be made explicit within a table. Is this primarily to tell the user that the given column value ...
1
vote
2answers
84 views

How to break down RELATIONAL data into HIERARCHY data structure?

I have a query that returns the following dataset: RELATIONid MAPid D1id D2id D3id 4999 4999 626 1250 7 5000 5000 626 1250 8 For the next step, I need to bind those ...
3
votes
2answers
429 views

How to split numbers and text in MySQL

I have searched over the internet looking for a function like REGEXP_REPLACE in Oracle, regexp_replace in PostgresSQL but I haven't find one similar in MySQL just REGEXP and RLIKE, but these operators ...
3
votes
3answers
2k views

No advantage of using Cross Apply or CTE over inline sub-query

I came across a query like this: SELECT (SELECT COUNT(1) FROM Orders o WHERE i.ItemId = o.ItemId) [C] FROM Items i I changed it to following ;WITH cte_count AS ( SELECT COUNT(1) c, OrderId ...
0
votes
2answers
306 views

Select all from table using procedure oracle

I am trying to execute the select command in a procedure.Initially i retrived all of the columns of the table in the procedure using cursor. The real problem comes when I am trying to access the ...
3
votes
1answer
136 views

Skip specific field name

I am trying to execute a table from a MySQL database using a for loop statement, in order to get the field names as the column header. Here is my code: $result = mysql_query("SELECT * FROM ...
2
votes
2answers
277 views

Scheduling MySQL Workbench to execute and export on a daily basis

Here's my question. I have a couple scripts (very simple stuff; select queries) that I run in MySQL Workbench which I can than export to CSVs. What I want to know is if it is possible to schedule ...
2
votes
2answers
29 views

Indexing order by columns

Based on the query below it was suggested that I create an index on the column in the order by clause. My understanding is the sorting is done on the result set and not the table. The person ...
2
votes
1answer
235 views

Where is the default postgres user path environment set?

This is probably simple but I can't seem to find the answer. We have a server running postgresql 9.4 on CentOS 6.6. Recently we had somebody run a yum install for postgres which installed postgresql ...
3
votes
0answers
80 views

Need a way to prevent log shipping from kicking users out

We have SQL Server 2012. A service we use requires us to use log shipping, however we are tired of having users being kicked offline every 15 minutes. Are there any creative ways to get around this (...
5
votes
2answers
124 views

Combine two event tables for multiple timelines into a single result set

This question is an extension to a question I've previously asked that was overly simplified. The more accurate example is demonstrated in this SQLFiddle, where I demonstrate a working (but slow) ...
4
votes
1answer
175 views

Slow window function query with big table

I'm doing some performance testing on a new DB design on PostgreSQL 9.4rc1 and I'm seeing some pretty slow queries using window functions. Here is my table setup: CREATE TABLE player_stat ( ...
5
votes
2answers
512 views

Can CLR execution continue after 'THROW' is encountered in T-SQL?

I am calling a T-SQL stored procedure from a CLR stored procedure. and the THROW statement in T-SQL stops the execution of CLR without going into the catch block. Is there something I can change in my ...
4
votes
1answer
134 views

Why does it take so long for Postgres to return a sequence number?

I have an application that does bulk loads into a large table (100 million rows). I am using Postgres' COPY FROM functionality to load data from a flat file. The target table has a primary key of id. ...
2
votes
2answers
628 views

Would increasing innodb buffer pool size prevent a mysql crash?

My server keeps running out of memory for mysql. I keep getting. 150708 3:39:09 [ERROR] /usr/sbin/mysqld: Out of memory (Needed 258064 bytes) When I looked in my.cnf I saw that ...
2
votes
0answers
1k views

How can I eliminate false “connection string format is not valid” messages from SSIS log?

I have a project that uses the SSIS catalog with project-level connection managers. The connection managers' connection strings are overridden at the server using a project parameters file, to enable ...
2
votes
1answer
188 views

SQL Server process only using half of the memory on host

We doubled the memory on host that has a SQL Server Enterprise 2014 instance on it. After a reboot of the server we noticed that the SQL service is only using half of the memory. A little background ...
1
vote
2answers
37 views

SQL Server - Copy data from restored version to live database table

I am using SQL Server 2014. I have a database called LabDB. I have a issue where some data was deleted in the database. What I like to do is to restore the backed up version of the database in ...
0
votes
1answer
95 views

Problems in Choosing Foreign Keys :S

I am designing my very first relational database. I am now in the conceptual design, building tables and views, selecting the primary and foreign keys and normalizing everything. But now, I am stock ...
0
votes
1answer
62 views

Verbose Oracle RDBMS error log output examples?

I'm working on a project and my boss has asked that I find an actual example of the "verbose" output of an Oracle RDBMS query error. We want to see what they actually look like. I know that there are, ...
2
votes
2answers
299 views

Weblogic Error: Connection test failed [closed]

I am trying to create a SQL Server 2014 data source in weblogic through admin console. When I click on test configuration, I get the following error: Message icon - Error Connection test failed. ...
0
votes
2answers
1k views

how to set “result to text” with a tsql statement in sp?

is there any way to set "result to text" within of SP while this execute a process? a tsql stament? Thanks.
0
votes
1answer
112 views

execution plan question

I have this query running for long time (@P0 nvarchar(4000)) select emaildmo0_.Id as Id7_ ,emaildmo0_.CreatedDate as CreatedD2_7_ ,emaildmo0_.EmailAddress as EmailAdd3_7_ ,...
1
vote
1answer
801 views

Grant execute on specific type in Oracle

I have created a package and defined a type for collections as follows: create or replace package <schema>.<package> as ------------------------------------- type <type> is ...
0
votes
1answer
103 views

Multiple Cascade Paths (Not really) - Sql Server

In my database I have a table with 2 columns referencing the same column in a separate table. I know this creates a race condition, but I have a check in place to make sure they don't point to the ...
3
votes
1answer
45 views

Execution plan for COMPUTE BY

I understand that the COMPUTE BY feature is deprecated. Out of curiosity I would like to know how the query processor executes a COMPUTE BY query. The execution plan does not contain any hint: How ...
0
votes
1answer
215 views

SQL Server not using all cores

I have a server with 6 cores, I've installed SQL Server 2012 web edition, based on core licensing, allowing up to 16 cores. However, it only uses 4 cores. In the error log file: 2015-07-09 14:00:32....
1
vote
1answer
21 views

MySQL NDBcluster 7.3 limitation on Table Joining in a single SQL statement

I am a novice user of Mysql database and recently my company is evaluating MySQL Cluster for its shared nothing architecture and synchronised replication. However my colleagues informed me that the ...
2
votes
1answer
318 views

Update one column based on count of records of grouped value in another column

Given a table CREATE TABLE TABLE_ITEMS ( serial_num int null, item_group int null ); INSERT INTO TABLE_ITEMS VALUES (0,1), (1,1), (2,1), (3,1), (4,1), (0,2), (1,2), (2,2), (3,2), (4,2), ...
1
vote
0answers
2k views

view server state permission was denied

The strangest thing is happening on my SQL Server Management Studio. When I right-click any table, I get a "VIEW SERVER STATE permission was denied on object 'server', database 'master'. (.Net ...
2
votes
1answer
147 views

Synchronizing a RDS instance with another RDS instance

I have a database on an RDS Instance (master) that needs to be synchronized to another RDS instance (slave). I created a read-replica for the first one, but that is created as read_only so I cannot do ...
2
votes
1answer
45 views

Local SSMS client is not connecting one particular server

My SSMS is not connecting to one particular server say X except X it is connecting to all the other servers. Could not find the root cause for this problem do any one have idea here? Guy sitting next ...
2
votes
1answer
58 views

Oracle's (+) notation within function

If we use (+) notation we can have outer join. For example: select * from tab_a, tab_b where tab_a.num = tab_b.num(+) Is outer join. If we use function around columns, for example: select * from ...
8
votes
1answer
450 views

sp_cursoropen and parallelism

I'm running into a performance problem with a query that I can't seem to get my head around. I pulled the query out of a cursor definition. This query takes seconds to execute SELECT A.JOBTYPE FROM ...
0
votes
1answer
194 views

Determine Which Hard Drive the Database-Files/Transaction-Files are Stored

I have posted the following question in another forum. I was told that this problem is related to Sybase (something to do with our likely use of raw partitions). That's why I re-post this question ...
1
vote
1answer
177 views

MySql Innodb corruption recovery

I have a MySql database, just containing Innodb tables, that seems to have corrupted itself. It replicates to another server and it has corrupted that one too! The symptom is that I can restart the ...
6
votes
1answer
1k views

Adding a local user account into SQL Server

I have a (developer) instance of SQL Server 2014 running in my machine. For quick background I'm on a small network like this: Workgroup: HOME Users HOME\PCA HOME\PCB HOME\PCC I'm HOME\PCA. Now ...
1
vote
1answer
138 views

Migrating mysql.user table from MySQL 5.5 to MySQL 5.6

I have a tricky question. I am migrating from MySQL 5.5 to MySQL 5.6. I want to migrate 45 users in MySQL 5.5 to MySQL 5.6 Questions Should I just take a dump of the MySQL 5.5 user table and ...
1
vote
0answers
195 views

Using Oracle 12c database (SCAN) with Oracle 8 client

I have successfully connected to my 12c database using Oracle 8 client. The connection is based on using the database-scan as host in tnsnames.ora. There are 3 IP addresses reserved in DNS for scan......
3
votes
1answer
2k views

MySQL GRANT PROXY - what does it mean?

I run: show grants for root@localhost; and I see GRANT PROXY ON ''@'' TO 'root'@'localhost' WITH GRANT OPTION From mysql docs: https://dev.mysql.com/doc/refman/5.5/en/proxy-users.html This ...
1
vote
1answer
160 views

Get 10th and 90th percentile by customer

I have a table which contains customers and scores (based on different factors, irrelevant in this case; a customer can have multiple scores), which looks like this: customer_id | score | ...
0
votes
1answer
1k views

How to export an Access database and import to MySQL?

I am working on a Java project that sources data from an MS Access database, but I want to use MySQL because I have found it to be very easy to manage. How can I export an Access database that has ...
1
vote
4answers
129 views

SQL Server : auditing AD Users - how can we identity AD User account from AD Groups

I would like to identity which accounts on our servers belong to AD Users. Currently, I find a plethora of accounts from users that should in fact be part of AD Groups registered on the same SQL ...

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