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. ...

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2
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3answers
501 views

find all numbers that appear at least three times consecutively

This is a question from leetcode online judge I tried this SELECT Num FROM Logs GROUP BY Num HAVING COUNT (Num) >1 but got runtime error!! Anyhelp would be appreciated
2
votes
3answers
927 views

Return total number of rows and selected (aggregated) data

I have a function which is selecting some data from a table. I would like to return the selected data and the total number of rows in that table. How can I do that or how can I get the same result in ...
2
votes
2answers
1k views

How to insert values in junction table for many to many relationships?

I have three tables in database: trips(trip_id(pk), trip_name(unique), user_id(fk)) places(place_id(pk), place_name(unique)) trips_places_asc(trip_id(fk), place_id(fk)) Since many trips can ...
2
votes
1answer
405 views

Difference data between adjacent rows

I have a table (called Visits) with ReqTime DATETIME NOT NULL column AND Duration INT UNSIGNED column. Duration should be set to the difference of ReqTime for two adjacent rows. But Duration is not ...
2
votes
3answers
2k views

Can I use PHP function strtotime() in SQL queries?

I have this table, and I need to use a PHP function in the query. id time lastTime 1 08:02 2 08:04 3 08:30 I am using this query with the strtotime(), and it's not working: ...
2
votes
2answers
127 views

Database events that will cause deletion of index

In SQL server if we try to change a data type of a column having index ,then it deletes the indexes associated with that column and changes the data type . I was not aware of it and was faced problem ...
2
votes
1answer
4k views

Efficient way to insert/update/delete table records from complex query in Postgres 9.x

I have this function which returns a set a records and I need to persist those records into a table. I have to do it hundred times a day. My initial approach was just clear data from my table and ...
2
votes
2answers
3k views

How do I include nulls during comparisons in SQL Server?

So basically in SQL Server a NULL means there is no value and thus can't be compared which returns some unexpected results. For example, the following query doesn't return rows where value IS NULL ...
2
votes
4answers
609 views

How to join the latest previous record with SQL

The original question was posted on stackoverflow. I think this site could be more focused on db related topic. I have a table whose schema is like this: CREATE TABLE product_shipping( ...
2
votes
1answer
2k views

How to pass a parameter into a function

At the moment I have a view created, see it here in the answer. How can I create a function based on that crosstab() query , so I can pass a date, and get data for the specific date? Also is it good ...
2
votes
1answer
2k views

Very slow simple PostgreSQL query on RDS

I seem to be getting very slow queries on a medium sized RDS box (db.m3.medium, 3.7gb ram). This is across a table of 4,152,928 rows.. select sum(some_field) c from pages where pages.some_id=123 and ...
2
votes
2answers
253 views

Design of an application log database

We are generating logs like following example(this is a table no actual pipes): 2014-06-10 09:00:03.457 | Channel1 | Operation3 | Function15 | 15ms 2014-06-10 09:00:08.245 | Channel2 | Operation5 | ...
2
votes
2answers
331 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
1answer
303 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 ...
2
votes
2answers
153 views

How to merge column in mysql depending on match

I have one table which looks like this in mysql column1 column2 name column3 data 1 1 foo 1 1.5 1 1 foo 2 2.5 1 1 foo 3 ...
2
votes
2answers
63 views

Table Transformation with SQL?

I got a set of tables which have been imported into a database by transforming them like shown in the following picture: Now it is necessary to get the former tables back. Unfortunately the guy who ...
2
votes
2answers
301 views

UPDATE table with another table data

I want to update the table car_check field fencing.(total 40 rows).I also use postgis function. I think it's a little difficult.Any suggestions? The code is the first carid example. UPDATE car_check ...
2
votes
1answer
70 views

How to go about modeling the main object of relationship?

I'm using MySQL and MyISAM tables. I have a bunch of objects that I want to group together 1 object belongs to 1 and only 1 group 1 group can have many objects 1 group has 1 required main object ...
2
votes
1answer
725 views

Distributed - across multiple databases or servers - Transactions

I have some doubts related to transactions in SQL. I perform below steps. Connection 1 open for DB1 database Begin transaction for Connection 1 Run the commands on Connection 1 Connection 2 open for ...
2
votes
1answer
3k views

Query taking non-consistent time to execute [closed]

I have a query which takes large time to execute sometimes.When i checked the speed it was taking 15 seconds.But actually it should run faster than that.When i again checked the query it again ...
2
votes
1answer
1k views

Does existing msrepl_tran_version column need to be removed when re-creating replication?

What is the process for removing a replication and then re-creating the replication. I know the process to set up replication. However, If i wanted to take a publisher database copy it and restore it ...
2
votes
2answers
270 views

How to join multiple tables (SQL) to find the difference between an order and shipped quantities?

I have a collection of orders that were submitted to an internal ERP, which were processed and partially shipped. The table hierarchy is as follows: Order table contains OrderReference(PO), OrderID ...
2
votes
1answer
145 views

Is it ok to let users add new columns and tables to your database?

I'm basically making a database of databases. An administrative User can go in and hit "Create Database" (which is basically a table) and set up the column types and how many columns. Other users can ...
2
votes
1answer
1k views

Reorganize full text catalog is offline or online?

I need to schedule a Full Text Search Maintenance and I was reading this link: http://msdn.microsoft.com/en-us/library/ms176095.aspx. Reading this documentation I am supposing that I need to ...
2
votes
3answers
926 views

Is transaction log lost after backup on SQL Server?

I have database that has regular nightly backup (full recovery, full backup). I noticed some irregularities in data and wanted to check out transaction log to see what happened. I restored earlier ...
2
votes
2answers
3k views

Get all partition names for a table

I want to list all the partitions created by dynamic triggers in PostgreSQL 9.1. I was able to generate a count of partitions using this related answer by Frank Heikens. I have a table foo with an ...
2
votes
4answers
1k views

search for something in the first 1000 records in the table

If I do the following MySQL query select * from table where name Like '%john%' limit 5; that mean the query will search all the mysql database table and return only the top 5 results that match the ...
2
votes
1answer
3k views

Select the top 5 records and the specific column from each table in the same database

I have 50+ tables in a database. I don't want to use the following SQL on each table in a database. select top 10 * from {table_name} So, is it possible to display the first 10 records PLUS only ...
2
votes
1answer
808 views

SQL INSERT Query takes 2 seconds and sometimes much longer to execute

I know the question's title is bad, But I have an hard time figure it out my self... sometimes this query runs in 2-3 seconds and sometimes it's takes even 30 seconds I have a table named ...
2
votes
2answers
3k views

MySQL case sensitivity for table names

Why is it that different platforms (linux vs windows) does not support the same naming conventions? I'm stunned by the fact that the documentation uses file names as an excuse for this. Yes, windows ...
2
votes
2answers
953 views

How to GROUP_CONCAT between given rows?

I have a table as id diary 1 breakfast 2 walk 3 start 4 office works 5 office projects 6 end 7 taxi 8 start 9 preparing for meeting 10 doing the meeting 11 end 12 night I want ...
2
votes
0answers
200 views

Get all comment.message, status.message, users.* and profiles.* where users.user_id exists in friend.friend_id or friend.user_id

I need some help building this query because it's a bit complicated at least for me. I need to get all comment.message, status.message, users.* and profiles.* where users.user_id exists in ...
2
votes
1answer
744 views

Change in datatype?

I have a table on which rows are inserted on hourly basis. The row contains id, installation, product_id and hit_allowed. all of them were mediumint in the beginning. but few days back id reached it ...
2
votes
1answer
292 views

Flat query to Column structure

I am trying to structure a query for a calendar view. I want each row to return the details for a person and what they are doing for 7 days (split into AM and PM) So the result set might look like ...
2
votes
3answers
295 views

How to get all non deleted messages from one user

I have two tables one for messages called default_messages and the other for recipients called default_recipient. This is how SQL for those table looks like: CREATE TABLE IF NOT EXISTS ...
2
votes
1answer
158 views

SELECT for values in a table

I have this table structure: id1 id2 1 2 1 3 2 1 2 4 id1 and id2 are not unique as you can see in the values. I need to retrieve those values that exists in the two columns ...
2
votes
2answers
1k views

How can can I get object definitions stripped of all comments?

When I want to know if a stored procedure or views references a given name (table, view or column), I need a version of the object definition stripped of all comments. Is this possible by a SQL ...
1
vote
0answers
82 views

SQL Server 2012 memory issue [closed]

I am having performance issues on a Windows 2012 Server running SQL 2012. When I run the DBCC MEMORYSTATUS command I receive the following. Process/System Counts Value Available Physical Memory ...
1
vote
1answer
54 views

Full text search on multiple joined tables

I'm trying to set up a full text search in PostgreSQL but coming across the problem that the more tables I join to the query the fewer the results I get back. The tables I am trying to join are: ...
1
vote
1answer
46 views

Update records from one table to another in different databases where condition is accomplish

I have two tables stored in two differents DBs and I need to perform some sync between both tables based on lastmodifieddate and lastSyncAt. Let's call them as db1 and db2. This is the DDL schema for ...
1
vote
1answer
56 views

Returning case-sensitive input of case-insensitive array match

Taking a JSON table with some simple data: CREATE TABLE jsonthings(d JSONB NOT NULL); INSERT INTO jsonthings(d) VALUES('{"id":1,"email":"Test1@test.com"}'); INSERT INTO jsonthings(d) ...
1
vote
1answer
83 views

SSIS Transaction Problem

I am trying to use SQL transaction with my SSIS package so if any error comes changes are rollback. I am using an "Sequence Container" in Control Flow for this and setting its "Transaction Option" to ...
1
vote
1answer
94 views

Querying sums of grouped consecutive rows in PostgreSQL 9

I have data about people traveling in different countries like this: country | begintimestamp | distance Germany | 2015-01-01 00:00:00 | 100 Germany | 2015-01-01 01:12:13 | 30 France | ...
1
vote
1answer
41 views

How to shard a database like that of SO?

I know a bit about sharding but I cannot wrap my head around that fact that say eventually SO cannot scale vertically then how would they shard their SQL DB? Even if we assume SO will not reach that ...
1
vote
2answers
110 views

New to databases - does my ERD reflect good database design?

I'm making a database to hold data for a media player that I'm working on. Originally, I thought to use one table with the fields: {filePath,artist,title,album,track_number,length,date,artworkUrl} ...
1
vote
1answer
2k views

Mirroring SQL error log - Error: 8474, State: 11

I'm getting these errors in SQL error logs: An error occurred in a Service Broker/Database Mirroring transport connection endpoint, Error: 8474, State: 11. (Near endpoint role: Target, far ...
1
vote
2answers
844 views

Add function parameter to SQL query WHERE clause

I have a web application in java and it uses a query. I don't want to write the query into Java, so I made a function: CREATE OR REPLACE FUNCTION testFunc(inputs text) RETURNS TABLE(...) AS $$ ...
1
vote
2answers
225 views

Mysql fulltext index search returning weird result

I have ingredient table. I want all those recipes which have certain ingredients. Below is my table structure. Table(ingredient) - Applied fulltext index on ingredient column. ...
1
vote
3answers
105 views

Clustered Index improvemens for particular queries

I found a table that looks like this: CREATE TABLE [dbo].Table1 ( id INT primary key IDENTITY (1, 1), [idUser] INT NOT NULL , [Amount] INT NOT NULL , [Attempts] INT NOT NULL , ...
1
vote
1answer
299 views

Fetch data from same table using two group by clauses in mysql

I have one table name as consultant with 4 fields(id, name,user_type, Created date). I need to write an mysql query for return the count of user_type in each month. In my table, user_type is ...