An acronym for "Structured Query Language" (it's not the name of a specific DBMS product), SQL can be used in relational database management systems (RDBMS) to query, update, delete, and insert data as well as modify the structure of the database. It can also be used to manage schemas and data ...

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Text Storage and Database Design Optimization in a SQL Server Database

Given a database with a number of columns (c), where some of these columns contain text that is one of multiple values due to a set CONSTRAINT on the columns, what is the most efficient way to ...
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47 views

Modify text file with Oracle PL/SQL

I'm trying to open and replace a string in a text file with the following procedure: BEGIN v_file_name := 'text_file.txt'; v_filehandle := utl_file.fopen(v_file_dir, v_file_name, 'W'); v_id_nextval ...
2
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1answer
70 views

Table name with special character in the end

I have a table in database(oracle sql) which somehow contains one special character at the end which I dont know.I am trying to get that special character from its entry in table tab. SQL> SELECT ...
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1answer
28 views

Distributed transaction coordinator between SQL Server and Oracle

I'm not sure about distributed transaction coordinator so please bare with me on this, I'm probably asking this question wrong. I know distributed transaction coordinator is used in SQL Server and can ...
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28 views

Sql Server Agent Job

In my Local SQL Server 2008 I created a scheduled job (like daily email will send to particular user from the database based on condition). Now I decided to host my schedules in hosting server so can ...
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3answers
103 views

How to separate Stored Procedures (i.e. all the business logic) from Client Database so that it only contains client data?

Scenario: Our Application Database (in SQL Server 2012) contains entire business logic in the Stored Procedures (SPs). Everytime we have to publish the DB to the client, it unnecessarily results in ...
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2answers
43 views

Query for frequency of e-mail addresses in a field

Newbie here. I know the answer is out there, but lack the vocabulary to ask the right question... I am looking for a MYSQL query which gives me the frequency of addresses in the field emailaddress. ...
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2answers
128 views

How to create an oracle dump(.dmp) file using Toad?

We can export the entire database schema(skeleton) along with its data in one .dmp file using oracles "exp" tool. But how do I do it using Toad only. I can't use this C:\Users\kaunds_oliver>exp ...
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83 views

DB Design Payments Table

I'm working on a Desktop application that uses a DB to store information i.e (customers, houses, proprietors, payments). So the application must accept payments from customers to company, company to ...
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28 views

Build replication from backup not publication source

I have an interesting scenario I am trying to find a solution to. We currently have the current setup. ProductionDatabase (publisher) is the publication for transnational replication to the ...
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1answer
204 views

Formal name for functions that use the OVER clause

Is there a formal/academic name for the family of functions in Sql Server like ROW_NUMBER(), LAG, LEAD, RANK etc, that make use of the OVER(ORDER BY <PARTITION BY> ) syntax? How much of this is ...
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19 views

Optional oneToOne relations and criteria field

Introduction: Visitors can fill reports on my website. Those report can either be filled by a legalPerson or a naturalPerson. Constraint: I don't like empty fields and I would like to normalize as ...
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1answer
61 views

PL/pgSQL function or rCTE to detect depth of relations between two tables

I need to perform a PostgreSQL Function for checking the depth of relations. There is a circular binding from table a to b, back to another element in a and, in some cases back again to b. These ...
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3answers
309 views

Checking whether two tables have identical content in PostgreSQL

This has already been asked on Stack Overflow, but only for MySQL. I'm using PostgreSQL. Unfortunately (and surprisingly) PostgreSQL does not seem to have something like CHECKSUM table. A PostgreSQL ...
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1answer
17 views

Restarting a Publisher involved in Merge replication

Our hosting provider would like restart the SQL Server that a publisher in a merge replication topology. I'm not able to clearly understand best practice for doing this from the Microsoft docs. Our ...
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1answer
71 views

Update primary key column - NULL issue

I want to update a column that is a primary key using this code use BITS_TEE Update DMT_TEE_DTS_Production set ABCIndicatorCode = ( select HIST.ABCIndicatorCode from ...
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1answer
82 views

Inconsistent MySQL query execution times

We run tests on two servers: one in production [Old Server] and the other one in tests [New Server]. Both tests used the same database. [New Server] Dedicated MySQL 5.6.17 server on Ubuntu 14.04 ...
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1answer
34 views

WHERE attribute having two relation lines in the same SQL

I have a database designed with tree tables: checklist (id, name) tag (id, name) checklist_tag (checklist_id - FK, tag_id - FK) Running this SQL: SELECT cc.id as checklist_id, cc.name as ...
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1answer
52 views

Conditionally join table

I'm new to database design and have designed a database that seems fine for the application but looks like it has a major red flag to me. I have a master table which is then joined to another table ...
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52 views

Case always returns null?

I have a subquery that gets the DATEDIFF of two dates. However the first case always returns null yet the actual sub query returns dates?! CASE WHEN [date1] > [date2] THEN ...
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63 views

Reading Data from SQL Server database

I want to read data from each cell of database. If the corresponding value is encountered then I have increment a variable count for that corresponding variable. Consider the following table Ques1 ...
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20 views

utf8mb4 in SQL Server Express

We have some web applications based on databases using utf8mb4 as character set and utf8mb4_Standard as collation. We saw that we can use any character we want with this setting. In SQL Server ...
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2answers
35 views

Get the table affected by the query

How I can get the table which is affected by the query? Example Update cust Set name = 'john' Where custid = '4001' Output: cust ___________________________ Insert into emp(fname, lname) ...
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22 views

Get the most present elements from many fields

Here is my table: id|item0|item1|item2 --+-----+-----+----- 1 | 10 | 12 | 12 2 | 12 | 68 | 13 3 | 15  | 13 | 10 I just want to get the most present number of all itemX columns. The query ...
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20 views

Can I Create a Database and Tables in One SQL Command From PHP? [closed]

I tried separating the CREATE DATABASE and CREATE TABLES commands into different mysqli_query statements. The Database gets created but I get an error with: $create_tables = "CREATE TABLE ...
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2answers
46 views

How to import into database when records contain multi-line data

I am setting up a new database and I want to import lots of data from multiple spreadsheet files. One of the fields in these documents contains an array of data, each item declared on seperate rows as ...
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39 views

How to query group for increase or decrease in value

In MySQl I have a table positions and I would like to find out if position of certain app for certain feed in a certain country type has been increasing/decreasing and by how much from the last ...
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21 views

How to get data of two column from two table?

I have two Table MATCH_MASTER and TEAM_MASTER MATCH_MASTER |---------------------------| |M_ID | TEAM1_ID | TEAM2_ID | |---------------------------| | 1 | 1 | 2 | And Another table ...
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33 views

How to safely add column to replicated mysql database

We have 2 databases, one is a replication used for read only, with around a million records, we want to add a new column to the master db, to one of the tables. Do I just go on MySql workbench and ...
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1answer
23 views

Troubleshooting Resource Governor / Classification Function [closed]

I've been trying to configure / troubleshoot the resource governor on a sql server 2014 instance. I can't get any work into anything but the default resource pool. I've been following this ...
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4answers
61 views

Whether Logfile Shrinking is good or bad one for Performance in SQL? [duplicate]

I am using SQL Server 2008 R2 database and in that we have more than 70 databases. In a few databases I can see the log file size is more than 10GB. I am shrinking the log file size on a daily basis ...
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2answers
83 views

View with left joins are very slow

I have a view based on join of 3 tables and and query on view is taking 10 mins to fetch the results. Can anybody help me in reducing the time taken to fetch results? VIEW CREATE view ...
2
votes
1answer
38 views

Performance impact of Extended Events filter [like_i_sql_unicode_string]

I have created an extended events session in which I wanted to see all queries using nolock hint. I have decided to use it instead of sql trace in order to minimaze possible performance impact. ...
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64 views

How to change schema so that account_id reference is unique among 3 tables

Original image: Updated to have more-correct terminology and an 'is_debit' column: I am designing a (PostgreSQL) schema for a lottery website that uses double-entry accounting. 'jackpots', ...
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38 views

How can I decrease FULLTEXT initialization time?

I'm trying to decrease execution time of the a query. Using SHOW PROFILE, FULLTEXT initialization takes about 0.3, which is too high. Other values are at normal level. How can I decrease FULLTEXT ...
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votes
1answer
150 views

Splitting a csv column from select query into multiple columns

I have a stored procedure SELECT [ShipWorks].[dbo].[OrderItem].[Code] AS Code, CASE WHEN (LEN(ISNULL(MAX([ShipWorks].[dbo].[OrderItem].[Location]),'')) = 1) THEN ...
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0answers
21 views

Error in 'Master Database Restore' in SQL Server 2012 (Because of difference in SQL Server Build)

I have a backup of a master database that was taken from SQL Server 2012 11.00.2218 build. Now I have a new SQL Server installation with build 11.00.2100. I tried restoring the master database after ...
2
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1answer
51 views

Can SQL Server stop me from running an UPDATE statement without a WHERE clause?

Whenever I have to run an update statement, I always get nervous that I might forget the WHERE clause and overwrite the entire column in the database. Is there any setting or plugin or addon I can ...
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3answers
49 views

Excel - How can I use a SQL query to retrieve data on a database sever?

I have connected to a SQL server in Excel . I want to be able to import data from a table located on the server. However this table is too big to import into Excel, I'm talking millions of rows. I ...
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2answers
70 views

How to construct a set-based query for subset problem?

I have a DB of the following structure (picture shows simplified version) How should I construct a query to get only those recipees, that can be cooked, i.e. for each ingredient in a receipe ...
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2answers
44 views

Optimize rows to columns conversion

I have a big Oracle table (around 40 million rows) that looks like this: ID Name Question Answer Reason 3 Name1 1 Yes blah blah 3 Name1 2 No NA 3 Name1 3 ...
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27 views

The OLE DB provider “Microsoft.Jet.OLEDB.4.0” has not been registered

I am getting the error as follows : The OLE DB provider "Microsoft.Jet.OLEDB.4.0" has not been registered. I try it on google .I have install AccessDatabaseEngine.exe but no use it is used for 64 ...
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0answers
29 views

Merge/combine two queries with different dates

I have one query that runs a SUM statement based on daterange 1, and worked fine, and another query that run same SUM statement, but on a different date range. I would like to merge/combine the two ...
0
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1answer
28 views

Query to join three tables

I have three tables which I have to join. I'm not a good SQL writer. Can please sombody help me to prepare this using joins: branches ----------------------------------------- branch_id | branch_name ...
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3answers
59 views

Matching two rows in a single table if two specific keys have different values

I have a table called settings in that there are two columns and data like following. settings value ------- ------ depots 12 projectid 156 client ...
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0answers
19 views

SQL Server 2014 Install Not Creating Default Instance [duplicate]

I am trying to install SQL Server 2014. The problem that I am having is that during the installation it is not letting my choose whether I want to use a default or a named instance. I have been ...
0
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3answers
105 views

Why is my select statement so slow?

SELECT name FROM sys.databases WHERE name not in ('master','model','msdb','tempdb','ReportServer','ReportServerTempDB','1303VISBOC') AND CASE WHEN state_desc = 'ONLINE' THEN ...
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MySQL fulltext selection performance

I have 1.5M rows in a table. Following is the table create code: CREATE TABLE `jobs` ( `id` INT(8) NOT NULL AUTO_INCREMENT, `job_id` VARCHAR(50) NOT NULL DEFAULT '', `title` VARCHAR(255) ...
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1answer
44 views

Last row from a query without Order by

I have something like SELECT var1,var2 FROM table where var3=X AND var4=Y order by var5 desc limit 1; Running this query takes roughly 5 seconds on my database which is far to slow. I was ...
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2answers
33 views

Update the other columns which are for to have minimum of other 2 columns , difference between 2 columns , and others

I am working on data in oracle 11g as below : subscriber_id | count_s | count_t | min_count | diff | negative_diff | positive_diff 137606401 3 3 3 0 ...