1
vote
1answer
217 views

How to avoid MySQL slave to have errors after crash

I have a MySQL master/slave configuration (MariaDB 10.0.17). Sometimes, the slave or the master server crashes. After the crash and restart, I get some errors of duplicated keys on slave. The server ...
0
votes
0answers
66 views

mysql on delete cascade error

I have the following tables : as you can see there is a FOREIGN KEY from projects to files and another FOREIGN KEY from files to projects the sec one is set to on delete cascade (the idea is to ...
1
vote
1answer
301 views

phpMyAdmin and mysql not showing the same database

I have setup WAMP which I managed by using a tutorial and everything seems fine... I am logging into mysql as the root user with full privileges granted and I am able to create databases in mysql and ...
0
votes
1answer
49 views

GRANT permission to access to respective creator

Does the following command: GRANT SELECT ON EVENT TO STUDENT; grant student access to whole EVENT table? If yes, how to only give STUDENT access to EVENT(s) record created by respective STUDENT?
3
votes
2answers
3k views

MySQL unknown column 'password_last_changed'

When creating a user using this command create user 'foo'@localhost'; this error is shown ERROR 1054 (42S22): Unknown column 'password_last_changed' in 'mysql.user' Using MySQL server version: ...
2
votes
1answer
28 views

Attribute-Attribute Dependency

So as part of our college project, I'm working on CENSUS Database. I stumbled upon a problem wherein if an individual is below the age of 18, his/her marital status should only allow 'NA' and anyone ...
0
votes
1answer
34 views

Returning auto-generated primary key after SQL insertion

I am trying to submit data to a database and then have it return the value of the user_id (primary key) created by the insertion, but I can't get it to return the value. I use the same query in ...
0
votes
1answer
56 views

Need help on a database model design

I am creating a small booking application with Laravel. It lists some centers. Each center has its own unique rooms. Each room may be booked several times (with dates). From my application, I post the ...
1
vote
1answer
65 views

Made changes to my.cnf and mysqld wont restart - no backup

I thought I'd be clever and update my.cnf file to add ft_min_word_len=2 and didn't back it up first. I will never make that mistake again. Luckily, our project is still in production and no harm done. ...
1
vote
1answer
48 views

Is it possible to get a list of procedures created with WITH EXECUTE?

Is it possible to get a list of stored procedures create with WITH EXECUTE? I tried looking at sys.procedures, but they all have the principal set to null, and I know there are some procedures ...
0
votes
1answer
44 views

IS-A relation when defining tables

I already asked this question on SO, prior to realizing that there may have been a more suitable place. I am trying to implement an IS-A relationship between tables. Say I have a singer and a band ...
0
votes
1answer
90 views

Tmpfs for mysql tmp dir questions

I have a 768M tmpfs dir that I use for mysql temp directory. It occasional fills up when running reports on large date ranges. When this happen the report fails and I get an error 28. This actually ...
0
votes
1answer
85 views

Performance of MySQL BLOB fields processing

Suppose, I have large (about 1 GB) strings in ASCII encoding. I have to choose whether to store them as separate blob fields or split each one of them into smaller pieces and then store them as ...
0
votes
2answers
104 views

What is an easy query to fix up historical columns valid_from and valid_to?

I have a table with typical history rows using valid_from and valid_to dates. My table might look like this: | id | object_id | name | valid_from | valid_to ...
2
votes
0answers
77 views

Is it possible to trace queries that never complete with SQL Server 2008 R2?

Running SQL Server 2008 R2. We have some queries that typically take less than one second to complete, but, occasionally, they are taking longer than 30 seconds which causes a client timeout. ...
0
votes
1answer
1k views

SQL CHANGE DATE FORMAT IN BULK

I have a database with several hundred fields but my data structure is wrong. It is currently in uk format as follows: d/m/y 01/01/85 01/01/96 23/12/87 What would be the most efficient way to change ...
0
votes
0answers
46 views

The same timestamp in different MySQL versions

I read in mysql 5.6 SQL changes following text: TIMESTAMP columns not explicitly declared with the NULL attribute are assigned the NOT NULL attribute. (Columns of other data types, if not ...
0
votes
1answer
58 views

Database : what design to point on two possibilities?

I am designing a datamodel for a new project. One of the requirements specifies that some objects can point either a person or a company. What is the smartest way to achieve that? I have thought ...
0
votes
1answer
43 views

backup a specific set of tables to be moved to a remote system [duplicate]

I need to generate either backups or data dumps for about 30 tables. I want to generate a file of some sort that contains the data for these tables and transfer them to a different system. Each ...
1
vote
1answer
1k views

DROP LOGIN fails on SQL Server 2014

We have a database with an owner 'dbowner'. Our install procedure drops the login for user 'dbowner' and creates it again. On any other version of SQL Server the following SQL query succeeds: USE ...
1
vote
1answer
81 views

How can I create a database where entries are compressed files searchable by index? [closed]

I am trying to design a database solution for logging where the search indices are dates (days), and the values are zipped files. I am doing this because the sheer number of logs I am processing is ...
1
vote
1answer
260 views

How can I remove references to tables after removing .frm files?

So I had a bunch of csv files in my /var/lib/mysql/imports directory for importing into mysql tables I had created. To clean up the folder I deleted all the files in the directory (incorrectly ...
3
votes
2answers
265 views

Are scripts like sp_BlitzIndex and the others accurate on restored backups?

I am a developer trying to get a better grasp of things. I am wondering if using the scripts from BrentOzar.com will work on restored backups? For example if I have the DBA give a backup of ...
0
votes
4answers
413 views

Aggregate data from two tables with different field names

I have two tables that each have date and amount fields. This is for a donation system so one is pledges and the other is donations. Here are the structure of relevant tables and fields: pledges ...
0
votes
1answer
76 views

How should I store changes to items in the database?

I have items (tracked with itemid) that have attributes assigned to them (field1,field1 for example). At any given time, field1=val1, field2=val1, ..., fieldn=valn where val1,val1,...,valn = 1..100. ...
0
votes
0answers
137 views

Instance consuming large amount of disk space

I have an environment that is Microsoft Server 2000 and Microsoft SQL Server 2000. The database has a file size of 112 GB. The total size of the disk is 122GB. For some reason in less than a few ...
0
votes
1answer
328 views

Is it possible to simplify a query with multiple joins to the same table?

I have a rather large query which takes longer to run than I would like because of 17 LEFT JOINs on the same table. I've done some searching, but haven't found anything that is really similar to my ...
1
vote
1answer
438 views

SQL query to sum a column prior to date and show all entries after that date

I have a database function that sum a column prior to a date and after that date show all entries one by one. that function return the data ordered by a common field and apply the sum by date every ...
0
votes
1answer
34 views

Usage of non standardized queries

So this is more of a theory question than practical but I'd appreciate any help. My friend and I are doing a project to learn new stuff and have fun. He's a coder and I like to think that I'm good ...
0
votes
2answers
1k views

Get distinct count on calculated member?

I'm using SSAS and created a measure group that is linked to Fact_SalesMetrics on SQL Server. In that, I have seven measures. All measures have aggregation of Sum except Sales Invoice which has ...
4
votes
2answers
877 views

Check if contiguous date interval exists

I have a table in PostgreSQL which describes some events that have a start date and an end date: CREATE TABLE my_table ( event_id serial NOT NULL, start_date timestamp without time zone NOT ...
1
vote
1answer
36 views

purchasing item by client - how to ensure that user has enough funds?

I have to tables: users (id serial, coins integer not null default 0) purchases (id serial, price integer not null, user_id) When new row is inserted into purchases table I want to subtract amount ...
0
votes
1answer
66 views

copy table with all constraint

how I would copy a table with all constraints? I run select * into myNewTable from baseTable where 1=0 This copy a table but no with constraints
0
votes
1answer
97 views

Size of data in secondary exceeded primary after its initial resync from primary in MongoDB

I step down the primary node, deleted its data and performed the initial resync from new primary. But when i checked the size of data after the completion of initial resync, I found that the size of ...
2
votes
1answer
666 views

How to temporarily disable foreign keys in Amazon RDS PostgreSQL?

I'm migrating existing test environment to Amazon RDS PostgreSQL. The test framework has a feature of reloading data in certain tables to an earlier state. For this it disables foreign keys, deletes ...
4
votes
2answers
232 views

How to create INOUT assignment cast on Amazon RDS PostgreSQL? If not possible, then why?

I'm migrating existing application to Amazon RDS PostgreSQL. The application has cross-database support and for compatibility reasons it includes the following SQL: CREATE CAST (varchar AS numeric) ...
0
votes
1answer
402 views

“Incorrect Syntax near S” in Stored Procedure [closed]

I'm creating a SQL Server stored procedure and getting error Incorrect Syntax near S I'm not able to find the exact reason of the error. CREATE PROCEDURE RPT_IVR_CALL_SUMMARY ...
1
vote
2answers
607 views

Postgresql 9.4.1 stuck all queries when making multi updates

Before i used 9.3.5 and servers with ubuntu 12 with 32GB memory. After upgrade to 9.4.1, with more power server 60GB memory on each in wall replication and ubuntu 14, started get db stucks when run ...
1
vote
1answer
282 views

MS Access: adding column if not exist (or try/catch it)

this is an easy question, but I can't find out the solution... I have to check if a column exists and add it if the test is negative. How can I do with only sql code? This is the syntax for SQL ...
0
votes
1answer
177 views

represent multiple entities to one entity relationship

If suppose, I have following tables: Here, person can own either home or car. person can't own both at a time. If person owns home, then owns field will be equal to 1, if it owns car, owns field ...
1
vote
0answers
171 views

SQL server deadlock graph explained

I am testing a scenario or recurrent request that ends up in executing the following store procedure simultaneously ALTER PROCEDURE [dbo].[clear_class]( @classID [int]) AS BEGIN DELETE FROM ...
0
votes
1answer
52 views

MySQL tmp and tmpfs disk

I have mysql and i use a tmpfs disk that is 768 M. Mysql uses about 70% of the memory. There is about 1170 M available. If mysql uses ram to the point there is less than 768; will my RAM disk be ...
1
vote
1answer
419 views

How to edit data to 2 tables using MySQL Workbench

How to edit data in 2 tables using MySQL Workbench (or can I)? I use the below query to get the data but unable to edit it from the table (or Form Editor). SELECT * FROM TABLE1 ...
0
votes
0answers
70 views

Add Row To table on update Trigger

okay trying again. I have a trigger that I want to fire off whenever my order status changes to 'wc-processing'. So that My trigger doesnt copy ALL data onto this new table (vr_key) I want to use a ...
1
vote
1answer
94 views

Upgraded Postgres; how to access now-missing databases?

My local connection on my Mac (10.9.5) wasn't working to my Postgres (9.3) database (and therefore I couldn't actually export the data), so I tried upgrading it to 9.4. Luckily I can now connect to ...
1
vote
2answers
170 views

Find and return items based on matching strings across 17 tables

I must start by saying that I am at best a sql novice. I am doing some data analysis and consolidation for my company and need to find if items match across any of the tables. The info in the tables ...
-1
votes
1answer
34 views

How to data transpose in sql view?

Table1 Name CITY RANK Manish New delhi A Akash New delhi A Akash Aligarh B Vinay Barh C I have to transpose like Name New Delhi Aligarh Barh Manish A ...
-2
votes
1answer
83 views

PsQl data dump import [closed]

Psql databasename < file.db is the recommended method to import to a database. This doesn't work why?
0
votes
0answers
34 views

How to calculate complaint close time in hours and skip non working hours

**complain_id date_created date_closed** 1005 03/15/15 15:00 PM 03/16/15 11:00 AM I have to calculate complaint close time in hours and skip non working ...
1
vote
1answer
25 views

extract all unique chars from all texts across the table

I have a huge mysql table (20 columms by 320.000 rows) that contains a lot of text from a lot of languages and the problem is that I need to identify all the unique characters in that table. For ...

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