Structured Query Language (SQL). For questions about the language, not Microsoft SQL Server (tag sql-server).

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2
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2answers
146 views

My query fails to segment the results as intended. What am I doing wrong?

Update: Re-phrasing the question. Below are the results and the desired results. What do I need to do to get the desired results? See http://sqlfiddle.com/#!2/d0e13c/69 Thank you SELECT ...
1
vote
1answer
63 views

Order of output row in random order [duplicate]

When I do select query on single table then I get output rows ordered by primary key which is perfect, following query: select * from recondata where importid=131; but when I'm joining this table ...
3
votes
1answer
10k views

Writing a query to find all employee salaries that are higher than their managers

I have two tables with some dummy data. I need to find all employees that make more than their managers. I was led to believe the point of the exercise is to learn how to do subqueries. I can isolate ...
6
votes
1answer
5k views

How to remove known elements from a JSON[] array in PostgreSQL?

I'm facing an issue regarding using the JSON data type in PostgreSQL. I try to achieve storing a Java model denormalized in the DB. The model features lists of complex objects. Thus, I decided to ...
0
votes
1answer
15k views

How to calculate time difference in sql

I have one table named test. In that table I have a column named test_time of type DATE. I want to calculate the time difference between test_time and sysdate in minutes. select 1440 * ...
2
votes
2answers
457 views

Count where previous record exists in either of two tables

I'm trying to COUNT records on one table where both the counted records and their "previous" records exist either in the same table or on another. The table that I'm sampling has a composite PRIMARY ...
2
votes
3answers
2k views

Moved Model Database and now my SQL Server doesn't work

I moved my Model data and log files: ALTER DATABASE Model MODIFY FILE (NAME = 'modeldev', FILENAME = 'D:\Data\model.mdf') ALTER DATABASE Model MODIFY FILE (NAME = 'modellog', FILENAME = ...
3
votes
1answer
559 views

How to Substitute Variables in PostgreSQL

The given Oracle query inserts data into table by substituting variables. How I achieve the same in PostgreSQL? INSERT INTO control_threshold ( threshold_id, group_name, description, sql, ...
5
votes
2answers
742 views

PL/pgSQL fuction to find circular references

I have two tables ID Task 1 1 2 2 3 3 4 4 Col1 depend 2 3 2 4 3 1 4 2 ID and Col1 are related through FK constraint. I want to find out all circular references. Here ID ...
3
votes
1answer
6k views

Use limit with where clause in in mysql [closed]

I know where clause search and display the records as per criteria comes true, and limit is use to fetch the number of records from a table. But please help me when I am trying to use them both ...
0
votes
2answers
331 views

Is it possible to speed up this PARTITION BY query?

I've got a timeserie table. Each datapoint has also a statut field which indicates its providing source. I'd like to request last available datapoint as of date T but there could be several results, ...
2
votes
0answers
28 views

enable database to work with Snapshot Isolation [closed]

I can't enable snapshot isolation ALTER DATABASE mydb SET READ_COMMITTED_SNAPSHOT ON; ALTER DATABASE mydb SET ALLOW_SNAPSHOT_ISOLATION ON; query still 0 rows working 5 days and nothing ...
1
vote
0answers
272 views

Storing changes to stored procedure and triggers in PostgreSQL

I want a mechanism where I can store/track changes in stored procedure and triggers. I want to track these logs in some table. What is the best possible way ?
0
votes
1answer
248 views

Table Valued Parameter not pulling the correct data for my sp?

http://sqlfiddle.com/#!3/b2643/5/1 http://sqlfiddle.com/#!3/b2643/5/0 This link above has the sample database tables I created on SQLfiddle. I have 3 main tables in my stored procedure: ...
1
vote
1answer
64 views

How to maintain fixed number of rows per foreign key?

I would like to keep a record of the last N (say, 10) objects a user has viewed. I'm thinking a basic way to store this information might be the following table: CREATE TABLE history ( id ...
2
votes
1answer
279 views

Does Index Intersection work with Included Columns?

I've been asked by a report designer whether it is acceptable to add a new index to a table to speed up a particular report. The index would be on a single column, CreatedDate, but would have ...
2
votes
1answer
224 views

Replace consective numbers from a string

So if I have a table with values: Name ID ---- --- James 100 James 101 James 102 James 200 James 201 James 202 Alex 100 Alex 101 Alex 102 Alex 105 Alex 106 Alex 109 ...
0
votes
0answers
39 views

SQL Get result as a column

Is it possible to get a result as a column? The SELECT query will only need to return one record, however, at the time of querying the database it will not know what attributes are in the table, and ...
12
votes
1answer
934 views

How can I design a query to pause / sleep / wait for a specified amount of time?

I am testing a monitoring application against a SQL Server 2000 instance. How can I write a T-SQL query that takes an amount of time that I specify? For example, most scripting languages have ...
2
votes
1answer
593 views

How to speed up looped INSERT INTO statements?

I currently use the following statement, for 10,000 rows it takes about 150 seconds. I tried removing the index on the target table, but this didn't help. Running the loop without the INSERT INTO ...
1
vote
2answers
79 views

How can I set myself as owner of a database ? just using sql

As I want to view dependencies of just a couple of tables in my clients database I want to set myself as the owner of the database. If the database is called MyDatabase and my userName is ...
2
votes
1answer
218 views

Maintenance plan using external tool to execute query and stored procedures giving off no results

My situation is as follows: I am using a third party tool (VisualCron) to run stored procedures and sql queries on several database servers. The stored procedures are from http://ola.hallengren.com/ ...
2
votes
1answer
154 views

Will adding more indexes speed up using RedGate SQL DATA compare?

We want to use RedGate's SQL Data Compare to migrate user data from one DB to a DB on a completely different provider. This will be a time-sensitive operation as we do not want our site offline for ...
0
votes
0answers
39 views

Trying to import an addressbook

I'm trying to import a .sql-file that I got by converting an .dbf-file. The problem is this line: INSERT INTO address values ('', '', 'Dekanat', '', 'Fachhochschule Hildesheim/Holzminden/Göttingen', ...
-2
votes
0answers
189 views

Cluster index or Partition in postgresql [closed]

I have a products table with 20,000,000+ and it's increasing. It takes alot of time to fetch a row from that table with that query select * from products where user_id = 1. So i made a partition on ...
0
votes
1answer
5k views

pivot a table with cell name as column name

I have a table structure is : year | code | name| value | wef | 2014 | a001 | abe | 2000 | 2014-04-01 | 2014 | a001 | def | 3000 | 2014-05-01 | 2014 | a002 | abe | 2000 | 2014-06-01 | ...
4
votes
1answer
594 views

MySQL - GROUP_CONCAT returns duplicate data, can't use DISTINCT

I have a normalized database and I'm trying to return data from multiple tables using JOINs and GROUP_CONCAT. Problem: Rows are being duplicated with GROUP_CONCAT. I can't use DISTINCT because some ...
2
votes
4answers
111 views

Trigger or Stored Procedure?

Let's say I have two tables, foo and bar: CREATE TABLE foo( foo_id serial NOT NULL, count integer NULL, PRIMARY KEY(foo_id) ); CREATE TABLE bar( bar_id serial NOT ...
0
votes
1answer
206 views

Backup and Restore Database Method

I have a production database. I am using FULL recovery model. I am taking regular FULL backup every week. I am planning to take LOG backup every day. Now, if my database crashes or failed to load due ...
4
votes
3answers
15k views

A transport-level error has occurred when sending the request to the server

In our Vb.net application(userd within a local network connection inside a office), which is used from long time now some of the users get the errors only sometimes a day A transport-level error ...
2
votes
1answer
73 views

Is a SQL query still called a “query” when doing a deletion, update or insertion?

I'm not sure what to call a query that... isn't really a query; is "statement" a better word to use in place? Or how about "script"? Or would something else be more appropriate? Note: I've seen ...
1
vote
1answer
258 views

SQL Query Rewrite - Help Needed (Oracle)

Need help in re-writing the below SQL. The Query works fine for smaller database below 400 GB, but spends too much time for larger database above 600 GB. Oracle - 11.2.0.4 Database - Oracle ...
0
votes
1answer
489 views

Access table field on creating a trigger postgresql

How can I access table field on creating a trigger? CREATE TRIGGER foo_trigger AFTER INSERT OR UPDATE OR DELETE ON foo FOR EACH ROW EXECUTE PROCEDURE proc(foo.field);//here goes the parameter
1
vote
0answers
17 views

How to enable Parallel Data WareHouse? [duplicate]

How do I enable Parallel Data Warehouse on my Microsoft SQL Server. I am trying to run this SQL statement below and received this error. ERROR: Msg 11305, Level 15, State 10, Line 2 The Parallel ...
0
votes
2answers
2k views

How can I limit a hierarchical query to the point where there are multiple children?

This question is related to my previous question about hierarchical queries. I have a hierarchical query in Oracle 11gR2 that returns something like this: - Level 1 - Level 2 - Level 3 - ...
5
votes
3answers
5k views

Looping through values stripping 1 character at a time

I want to loop through values and strip 1 character at a time from the values and display the result. So if I have a table with values: ID ___ 34679 13390 89906 I want the result to look like this ...
1
vote
0answers
19 views

How can I select rows from a hierarchical query with the lowest level? [duplicate]

Apologies for the cross-post from StackExchange DBA - I wasn't sure which site was best for this question. I have a hierarchical query in Oracle 11gR2 that returns something like this: Parent ...
3
votes
3answers
5k views

How can I select rows from a hierarchical query with the lowest level?

I have a hierarchical query in Oracle 11gR2 that returns something like this: Parent (Level 1) Child (Level 2) Grandchild (Level 3) Child (Level 2) Grandchild (Level 3) Grandchild (Level 3) ...
-1
votes
0answers
64 views

Query Deadlock on Select Query [closed]

I have 2 queries deadlocking on each other. The first query is Select Top 1 NULL From [Table1] with (HOLDLOCK, TABLOCKX) Second Query is an insert query that only reads from [Table2] to put data ...
1
vote
1answer
10k views

MySQL SQLSTATE[HY000]: General error: 1205 Lock wait timeout exceeded

I have database session enable, when website got thousands of visitor. It gives me error [30-Apr-2014 04:27:12 America/Denver] PHP Fatal error: Uncaught exception 'PDOException' with message ...
0
votes
2answers
544 views

Is there a free/web-based game that requires knowledge of SQL to win? [closed]

Looking for an alternative way of teaching SQL, and wondering if there is a free/web-based game that requires knowledge of SQL to win. If possible, the game should not only be fun, but also track how ...
5
votes
1answer
323 views

SQL logs showing login that I can't find

Within my SQL server logs, I am showing a successful login to a database from an account (SERVER\loginname) that I cannot find in either Security > Logins OR Database > Security > Users. This ...
2
votes
2answers
727 views

SQL query for next occurrence of specific date

I am working on a function for our database that contains contract data. Each contract expires on a certain date, and then each contract has an expiration type that determines what happens after that ...
7
votes
2answers
387 views

Using wildcards in a like statement on an unindexed VARCHAR(MAX) column with more than 1 million records

In order to troubleshoot a problem, I have a one-time question as to whether a specific varchar(max) field contains non-printing ASCII characters (other than white-space). The following is my ...
5
votes
1answer
494 views

Optimize where clause using dates

I'm trying to optimize several queries that all use a similar pattern on one of the WHERE clauses: AND (DATEADD(DAY , ISNULL(a.[due_days], 30) + 30 , [dbo].[CalcDate]([type], ...
0
votes
1answer
249 views

SQL Server monthly Backup

I'm quite new to SQL Server and some employee asked me if is possible to make monthly database backups. We do daily full backups to NAS server via Cobian and we use SQL Server Management Studio to ...
3
votes
2answers
7k views

ORA-00979: not a group by expression

I'm getting the error: 'ORA-00979: not a group by expression' when I try to run this query. select empno, empname from emp.employee group by empno, empname having empmsal > avg(empmsal); I'm ...
1
vote
1answer
245 views

SQL Server agent job scripts

Being a newbie to database migration, can I script all the database jobs one by one and run them against a new server to create these jobs? If not, why do we use these SQL job scripts? Thanks in ...
2
votes
3answers
1k views

Oracle 12c in-memory option

I've been told that there's an oracle in-memory option for 12c and that it uses columnar compression to get some great query speeds. I'd like to leverage it for some business intelligence stuff. I've ...
1
vote
1answer
10k views

Declaring a scalar variable that its a table valued parameter?

I get error 137 that I must declare a scalar variable (@facilities), although I'm declaring it in the Create stored procedure as a readonly variable, so I wasn't sure what I'm missing here. any advice ...