DO NOT USE this for questions targeting Microsoft SQL Server, use the tag sql-server instead. "SQL" is an acronym for "Structured Query Language", it is used in relational database management systems (RDBMS) to query, update, delete, and insert data as well as modify the structure of the database. ...

learn more… | top users | synonyms (1)

0
votes
0answers
1 view

Why is the transaction log file not truncated though its simple recovery model?

My database is simple recovery model and when I view the free space in log file it shows 99%. Why doesn't my log file truncate the committed data automatically to free space in ldf file? When I shrink ...
0
votes
0answers
12 views

How does Relation works in NOSQL?

i was using SQL in all my previous application and to understand the Parse.com db storage, i wanted to know NOSQL. I tried searching the differences between SQL and NOSQL for past 2 days & i ...
-2
votes
0answers
11 views

Calculate percentage of a column group by 2 columns in pivot table format using oracle 11g sql [on hold]

I would like to request help displaying count of a column and respective percentage of a column as in pivot table. I tried several options of which I yielded 18 rows when used kind of select first ...
3
votes
1answer
94 views

Update old database with SQL dump

I had to recover a database with a some months old full backup. I have however in my possession a most recent but unfortunately incomplete SQL dump for this same database done with mysqldump. Is ...
0
votes
1answer
21 views

Error: Incorrect usage of UNION and ORDER BY

I have this query: SELECT DISTINCT CONCAT (MONTH(`Date`),'-',YEAR(`Date`)) from wp_result_plugin WHERE Bet=2 AND month(`Date`) = EXTRACT(month FROM (NOW())) ORDER BY MONTH(`Date`) ASC UNION ...
0
votes
2answers
103 views

Idea for manking tables for a pharmacy

OK I'm not into Database management, but I got this problem, also not sure if I'm posting it at the right place or not. So, my Dad works in a pharmacy and all the work there is on paper and is done ...
-4
votes
0answers
18 views

what the wrong in this stetment [on hold]

Dim sqlQRY As String = " Select invqu FROM invodet WHERE invsun = '" & DataGridView1.Item(i, j).ToString & "' AND invon = " & Val(TextBox1.Text) & ""
1
vote
1answer
28 views

Combine multiple query into 1 query

I have a message table that contains words field, array type, with random words of a message. Now I have an array of words [A, B, C]. I need to find the number of messages that the words contains ...
1
vote
1answer
177 views

Not able to update MySQL table using Oracle: Unknown column in 'where clause' {42S22,NativeErr = 1054}

I have the following tables: MySQL table: jti_member_interact CREATE TABLE `jti_member_interact` ( `INT_MEMBER_ID` int(11) NOT NULL, `INT_ID` int(11) NOT NULL AUTO_INCREMENT, `INT_SOURCE` ...
2
votes
1answer
29 views

Can This Update Query Be Made Faster?

update line_items set product_id = dups.latest_product_id from line_items as li join products p on li.product_id = p.id join vendors v on p.vendor_id = v.id join vendorgroups vg on ...
-2
votes
0answers
11 views

This query returning different result sets [on hold]

Hi is have this query (SELECT DISTINCT CONCAT (MONTH(`Date`),'-',YEAR(`Date`)) from wp_result_plugin WHERE Bet=$Bet AND month(`Date`) = EXTRACT(month FROM (NOW())) ORDER BY MONTH(`Date`) ASC LIMIT ...
0
votes
2answers
658 views

SQL - Cannot Add Foreign Key Constraint

Can anyone tell me why there are errors such as : Cannot Add Foreign Key Constraint And am i on the right track ? DROP DATABASE technology_university_hospital; CREATE DATABASE ...
0
votes
2answers
148 views

What's faster: two UPDATEs with WHERE (in / not in) or one UPDATE with CASE?

What's best performance wise, two separate UPDATEs: UPDATE table1 SET enabled = 0 WHERE code NOT IN ( SELECT id FROM table2 ); UPDATE table1 SET enabled = 1 WHERE ...
0
votes
0answers
7 views

How to Extract suffix from the table column names [on hold]

I have 2 tables , 1 contains answers and columns are A1, A2, A3 so 3 in A3 means this is answer to the question 3. tblAnswers Personid A1 A2 A3 =============================== ...
-1
votes
0answers
17 views

Add one column from another table [on hold]

I have query which works fine, but I wanted to Add one column from another table. Here is my query:- select Id,username,email,usertype,active,(CASE WHEN usertype='1' THEN 'Admin' WHEN usertype='0' ...
0
votes
1answer
30 views

Why people often said nosql has better write performance than sql? [on hold]

I have been hearing these comments all around the internet. But I cannot see a good justification for it. Agree that nosql use de-normalized scheme to store data, which does not require join (for ...
7
votes
1answer
421 views

Designing Simple Schema for Disaggregation of Demand Forecast

I am doing a simple database design task as a training exercise where I have to come up with a basic schema design for the following case: I have a parent-child hierarchy of products (example, Raw ...
2
votes
1answer
21k views

SQL Server is configured to allow remote connections

I use SQL Server 2012 and SSAS Tabular Mode (My Instance Name Is MSSQLSERVER2012T) Then I download AdventureWorks Tabular Model SQL Server 2012 From This link I open it with Visual Studio 2010 and ...
0
votes
2answers
488 views

How can I simplify this query?

I have written the following SQLite query: SELECT sum(amount) / (julianday('now', '+1 day') - julianday('2012-08-11')) * 14 AS 'Cost Per Fortnight' FROM ( SELECT "transaction".transamount AS ...
0
votes
0answers
16 views

How to extract common subqueries to simplify?

I have a query like this: select S.ID, S.name student as S where not exists ( (select course_id from course where department_name = 'Biology' ) except (select course_id from S where ...
1
vote
1answer
54 views

Should I create a Factless Fact Table or Denormalise my table

I am creating a data warehouse from a store database and I have a question regarding the design of my dimensions and facts. In the store database a table exists for Person, Person_Address and ...
0
votes
1answer
103 views

How to perform same DML statements on two different servers (Oracle and SQL-Server) simultaneously

I have two servers, Oracle and SQL-Server. I have same database on both the servers. I want to perform DML (insert,update,delete). How can I perform same DML statements on both the servers ...
0
votes
0answers
38 views

sp_WhoIsActive is not displaying results

I'm trying to use the sp_WhoIsActive stored procedure that I've downloaded from here: http://sqlblog.com/files/folders/release/tags/who+is+active/default.aspx I'm running the procedure without ...
2
votes
1answer
33 views

Can't seem to understand why STUFF isn't working

I've got two tables that store questions and possible answers. The questions table can have multiple possible answers to it. I want to display the possible answers it can have per question.. For ...
-1
votes
0answers
28 views

MySQL - Combining multiple rows as one in one table [duplicate]

I have one table employeeId | attribute | value 1 name John Doe 1 email john@example.com 1 age 28 2 name Jane Doe 2 ...
0
votes
1answer
19 views

How connect by is really working? How is it multiplying rows?

I know (on high abstract level) how hierarchies in Oracle works, but this one I do not understand. When issued following query: select rownum-1 as num from dual I've got one row as result. The ...
1
vote
1answer
13 views

Error when restoring SQL Server 2008 R2 backup on 2012

I am trying to restore a .bak file (backup taken on SQL Server 2008 R2, compatibility level 100). I am restoring the backup on SQL Server 2012 edition. I get the below error. Unfortunately the ...
0
votes
1answer
148 views

SSIS Dataflow Task issue, moving data from SQL Server 2008 to MySQL via ADO.Net

Can you please help me in getting this problem solved.. I'm trying to build a SSIS package where I'm moving the data from SQL Server 2008 to MySQL. However I'm getting a weird problem in dataflow ...
0
votes
1answer
13 views

Setting Key Constraints using a Diagram

I been using SSMS for diagramming my databases and I got used to create the key constraints with this tool. Now I started thinking, while going through related chapter of a book, "...maybe this is not ...
1
vote
0answers
20 views

Best practices to segment people and attributes for advertising database

we have a database where we store people some attributes per person in the following tables: people (id, name, email, phone) people_attributes (id, person_id, attribute_name, attribute_value) ...
0
votes
6answers
10k views

How to recover deleted/updated record in sql server or mysql?

I want to know that is there any way that I can can recover the deleted or updated record in the sqlserver and mysql as well?
1
vote
1answer
234 views

I need advice on these queries

could you help me optimize these queries? here are queries, please note that you see something like OR 1=1 OR those are values I pass via php and may change. query#1: SELECT posts.status, ...
1
vote
1answer
474 views

What are alternatives to Replication to distibute data (Microsoft SQL Server)

Is anyone knowledgeable of alternatives to SQL Server replication? I have a scenario where separate databases will share a lot of the same data which complex queries will match against. We want to ...
0
votes
1answer
206 views

DELETE from Linked Server table using OPENQUERY and dynamic criteria

I'm attempting to run a DELETE statement from my local MSSQL Server to delete appropriate records from a table in my remote linked server using OPENQUERY(). I'm using the following code, but it seems ...
0
votes
0answers
46 views

Why are transactions long running?

My stored procedure has a transaction blog. I pick up a record from a database and process it in that transaction block. I noticed that my transaction log has grown in gigabytes. But my transaction ...
1
vote
2answers
108 views

Check entry based on entry in another column

Still fairly new to databases and SQL, so bear with me. I'm trying to check whether or not data can be inserted depending on data in another column, create table Table1 (PaymentType varchar(5) ...
3
votes
1answer
1k views

How to separate out individual sql statements from Oracle SQL script for execution from java code

I have Oracle DB 11g Enterprise Edition and I want to execute sql script from my java code. I am reading this sql script from a .sql file and the script contains statements such as create table, ...
8
votes
3answers
265 views
+100

Mathematical equality of two SQL statements

Is there a way to get check the mathematical equality of two SQL statements? I have two SQL statements: SQL_STATEMENT_1 SQL_STATEMENT_2 Running both statements on data and comparing the output ...
1
vote
1answer
30 views

Call function where argument is a (sub)select statement

My function takes an int4 as argument and returns a table: SELECT * FROM test_function(545421); -- works fine SELECT * FROM test_function(SELECT customerid FROM tableX ...
0
votes
2answers
478 views

Netezza Error Record size 120000 exceeds internal limit of 65535 bytes

I have a column PARAM that has JSON data that looks like this: JSON:{"Name":"RES_InformationalIssues","StepName":"Page_1","StepData":"f601e9fe-d68a-4ed7-bbaa-f40c9cbc4d12=General Product ...
-2
votes
1answer
32 views

Generate create table DDL from any arbitrary select query? [on hold]

Is there a way, given any arbitrary select query like: select myfavoritenum, myfavoritetxt from tablewithmanycolumns and magically receive a create table statement: create table justmyfavorites ( ...
1
vote
2answers
106 views

Postgres multiple columns to json

I am running postgresql 9.3.4. I have a table with 3 fields: id name addr --- ---- ---- 1 n1 ad1 2 n2 ad2 ... I need to move the data to a new table with fields like: id data ...
0
votes
1answer
25 views

Query calculating AVG per minute GROUP BY timestamp

I'm trying to query the average for each minute, so I can generate graph per 5, 15, 30 minutes. Here is my table, date stored in MySQL DateTime data type field. timestamp vif_2_rx ...
0
votes
1answer
29 views

Insert date values in a created table

I have created a table using the below query CREATE TABLE job_history ( EMPLOYEE_ID decimal(6,0) NOT NULL, START_DATE date NOT NULL, END_DATE date NOT NULL, JOB_ID varchar(10) NOT NULL, ...
0
votes
2answers
75 views

How can I replace the following query with ISNULL function in SQL?

I have the following query. For performance optimization reasons I have been asked to replace the logic with ISNULL function in SQL. How can I achieve this? please advice. SELECT ...
0
votes
1answer
23 views

Insert sum of the row data of each record into separate column in postgreSQL?

I have a table id name class social science math Total 2 Max Three 85 56 85 3 Arnold Three 55 40 75 4 Krish Four 60 50 70 ...
0
votes
0answers
47 views

How can I replace the cursor in the below query?

I have this below query which calls a stored procedure that takes only 1 item's attributes at a time. But because of performance problems we are required to remove the cursor. How can I replace the ...
1
vote
1answer
44 views

Why is my transaction file growing when db is in simple mode and there are no waiting transactions

I noticed that my database log file has reached 160GBs. My database is in simple recovery mode and I used the following query to see if there are any waiting transactions. SELECT ...
0
votes
1answer
101 views

how to select top ID from join operation and staging tables

I have this inner join from staging and operations table jobsCode I want to select the top surrogate key ID and get the Start_Date from this join my problem is my Query rerunning 2 records original ...
2
votes
2answers
120 views

Tuning Postgres for Single connection use? Or is postgres wrong tool?

Any rules of thumb for work_mem, maintenance_work_mem, shared_buffer, etc. for a database that DOESN'T anticipate concurrent connections and that is doing lots of aggregate functions? I'm a social ...