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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1answer
142 views

I am Trying to Write an Access Query to Get a person having a First Name and Last Name but not all People having any of those names

I am using Microsoft Access. In my search form I have 3 text boxes that I enter text to search for: First Name; Last Name; Last 4 of SSN. With the current query when I enter text into multiple boxes ...
0
votes
1answer
145 views

Recommendations for how I should create my table based on data given?

I'm asking this as I'm kinda overwhelmed by the data presented to me (I'm still fairly new in programming and SQL). Basically I need to create a database to store warehouse equipment information, and ...
0
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1answer
3k views

Stored procedure to compare two columns from different tables and make the insert

I have two tables: Project with fields fld_id (integer), fld_allocated_hours (integer), fld_project_id (integer) Timesheet with columns fld_id (integer), fld_allocated_time (integer), ...
0
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2answers
72 views

How to use max function in such condition?

My query is select * from guestuser union select * from olduser ORDER BY userid DESC LIMIT 1; Is that correct query to find last userid from different table have different userid? can i change ...
10
votes
2answers
9k views

ORDER BY using custom priorities for text columns

This is a sample table: name | cat ---------- hugo | sal bob | mgr mike | dev jeff | mgr john | dev Both name and cat being Varchar. cat reflects a category for these names, but I like to assign ...
2
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1answer
10 views

ANSI SQL for links

Oracle provides a "link" mechanism in order to access a different database instance than the one on which the query is running. DIM_DATES@OTHERDB Is there any ANSI SQL standard way to code this?
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3answers
1k views

does the mere existence of a primary key increase query speed for large data sets?

So, I have a table with about 2.4M rows and ~30 columns. There is no unique column within the data. The data is transaction logs from stores where each transaction number is only unique on a per store ...
1
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0answers
33 views

MySQL - Transactions and causality

I'm new to MySQL's LOCK and TRANSACTION and have a question about different isolation levels of a transaction: Given two transactions executing the same code (auto-commit is false): (1) get data of ...
0
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2answers
337 views

SQL: TSQL to Find invalid views

we have a Tuesday/Thursday Maint window for one application we support. On Tuesdays we modify one facility and thursday if there are no errors we roll all the changes out to the other facilities. The ...
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0answers
76 views

SQL Server is very slow [closed]

In company with 30 clients(computers), after 3-4 hours working with financial software, SQL Server is very slow SQL Server can not free used memory and the query execution time is very slow but after ...
0
votes
1answer
395 views

Insert values in table from front-end CategoryId

I want to add a value from front end into a table. I want to do it in asp.net. I have a table which is as below:- CategoryId int CategoryName nvarchar(50) not null ParentId ...
1
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1answer
306 views

Join select queries on an id in SQL Server

I have three tables that SELECT from and I'd need to join the results. It feels like this should be a rather easy task but I struggle with the syntax. Working on Microsoft SQL Server Enterprise ...
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3answers
393 views

What is wrong with this INSERT Statement

I am trying to use this statement to insert new data into my orders table like so: $tsql2 = "INSERT INTO pedidos (numero_local, emailUser,codigopapel,cantidad, color) VALUES ('$local', '$emailOn', ...
1
vote
1answer
134 views

SQL Server Query performance with window function

We write a query that include unpivot, partition by and order by.Query is: SELECT PersonId ,SalaryDate ,ID ,Type ,SalaryValue ,ROW_NUMBER() OVER ( PARTITION BY PersonId ...
1
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2answers
3k views

How to split one big table that has 100 million data to multiple tables? [closed]

I have one database in SQL Server 2012. In it there is one table that has more than 100 million rows. I want to split that table to multiple similar table with 1 million rows in each table. What is ...
0
votes
1answer
486 views

Mysql pagination without offset

Let's assume I have got a table with these data: I want to order it by createdAt column DESC, and id column DESC select id, createdAt from post order by createdAt desc, id desc Now it looks like ...
1
vote
2answers
620 views

TSQL substitute for MAX() string ranking

I have a table with repeating values (col1) and I need to return col2 based on a ranking system. In my example the ranking system is handled by MAX() giving me the highest value. I then return the ...
0
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0answers
63 views

Table design for optimum performance

For example let's say I have to create a table called Employee with columns EmployeeID, Name, DOB, Address, DepartmentID[FK]. So I create the table as follows with a primary key and a nonclustered ...
0
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2answers
63 views

SQL Performance: COUNT or extra attribute?

If I want to count the number of a multivalued attribute, which way is faster: a) using COUNT(attribute) on a whole table or b) adding an extra attribute which counts these stored values (to be ...
6
votes
3answers
249 views

Most cost efficient way to page through a poorly ordered table?

I have a table that has three columns: HashUID1, HashUID2, Address_Name (which is a textual email address, and the previous two hash colunms are of some crazy creation to link event participant tables ...
0
votes
1answer
60 views

How to design a query that gives count of different parameters based on different condition from a single table

I have a table books containing columns as bookid, issue_date,return_date. Once a book is issued from library an issue_date corresponding to it is made into the table while return_date can have valid ...
0
votes
1answer
85 views

SQL: return values as column table

I am running this query to get all returns for a list of tickers: select return1 from STOCK_DATA where TDATE between 20130101 and 20131231 and TICKER in (SELECT DISTINCT TICKER FROM STOCK_DATA) ...
0
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1answer
61 views

How can I Use Access to combine tables of information

I have two tables in access with a common ID number in both. One table has mail to info and the other table has account information. The account information can have multiple listings per ID. The mail ...
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3answers
148 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 , ...
4
votes
4answers
865 views

Keep track of time intensive stored procedure with prints

I am no database admin nor is my SQL-foo any good (yet), but have a few tasks to get done in MSSQL, and one is a rather time intensive procedure where I fetch from a CURSOR and WHILE @@FETCH_STATUS = ...
0
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0answers
40 views

Thoughts on further optimizations

So I have this application. It runs on a server. There is a portion of the code that is taking around 10-15 seconds to run, it contains some queries, logic, as well as some code to update the ...
0
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3answers
294 views

Get latest status of an item in the database

I have this table: ID|Item-FK |timestamp|status ============================= 1 | 123 | ... | OK 2 | 123 | ... | FAILED ... I want to query get all items which last status was FAILED. ...
1
vote
1answer
497 views

MAX (id) function with MySQli

How can I use the following statement to return only the record with the maximum PersonID from the table? /* Create the prepared statement */ if ($stmt = $mysqli->prepare("SELECT Max(PersonID) AS ...
0
votes
0answers
510 views

SQL Server : error 15208 Level 16, State 1, Line 1

Trying to Backup a certificate from SQL Server causes this error: Msg 15208, Level 16, State 1, Line 1 The certificate, asymmetric key, or private key file does not exist or has invalid format. ...
2
votes
1answer
141 views

How to get all logged in users to SQL Server database for this week?

I'm using SQL Server 2008R2 and I setup a testing database that I need to know who tried logging in so far. Is there a stored procedure or a View or anything that I can gather these type of ...
1
vote
1answer
153 views

How can I design this database?

So I have a ton of transaction logs in pipe-separated format spread across a few dozen files. Concatenated into one file, it's around 2.4 million lines. Each transaction has a store number and a ...
0
votes
1answer
310 views

MySQL Loop Through Each Row

I have two tables, division & template, in a MySQL database. division - DivisionID - DivisionName template - TemplateID - TemplateName Here is an example of my current data ...
2
votes
2answers
462 views

SQL Backup tuning large databases

I am tuning SQL backups using compression, writing to multiple files, and changing the BufferCount and MaxTransferSize options. I have SQL instance with a 4 TB database and several smaller databases ...
1
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1answer
549 views

Select statement for selecting every week's log record

Here is a simplified version of the table in question: +------------------------------------------------------+ | DatabaseName | LogRecordNumber | LogTimestamp | ...
1
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2answers
367 views

Are there any special characters that are never allowed in SQL?

I am a Java programmer. We always make database-related things configurable so that they can be easily modified by the DB team as per their requirements. I want to make some queries as configurable, ...
0
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0answers
66 views

Paging via Number of Result Record vs COUNT(*)

I have been working on fixing a piece of code for a customer that has been very slow for them. I have made that fix, and thats all lovely, but I noticed something odd in the paging. When the query ...
5
votes
2answers
514 views

How to store immutable, unique, ordered, lists?

I have an entity with millions of instances. Each instance has to reference an ordered list of items. The lists have to be unique so no list will be stored more than once. But once created, both lists ...
1
vote
1answer
4k views

Store the resulting list of a SELECT in a variable to count AND use the result

I have stored procedure that uses a cursor and for every fetch a duplicate SELECT, once to determine the number of IDs found (SELECT COUNT(ID) FROM TableA WHERE something.. @cur_var) and if the ...
2
votes
1answer
35k views

Case with multiple conditions

I need to change returned value, from select statement, based on several conditions. I tried something like that: ,CASE i.DocValue WHEN 'F2' AND c.CondCode IN ('ZPR0','ZT10','Z305') THEN c.CondVal ...
1
vote
1answer
290 views

SQLAnywhere: Visualize in real time CPU and RAM consumption of sql connections

I want to keep track of which connection use most of resources. Within Sybase Central (SQL Anywhere 9, 12), for each server and database, we have pane to check in real time All Connected Users and ...
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 ...
3
votes
1answer
392 views

SQL Azure Performance of new servers

I have a fairly small database ~200MB which when running in the web edition of SQL azure is lightning fast. I've switched it to the basic edition and all of a sudden a group of queries which took less ...
3
votes
1answer
136 views

Why postgres is using an odd index with no relation to the query

(Debian 7, Postgres 9.3, dedicated machine with huge cache) I have one big table called process_data (14gb) and another tiny lookup table called process_location. I'm doing a query between these two ...
0
votes
1answer
66 views

Design: Fitting variable hierarchy of text files into a relational db

I have a large data corpus (several TB) made up of data gathered through customer support queries. I've been asked to set up a database to make this data more accessible, but as I'm kind of new to ...
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2answers
209 views

How to deal with very large transaction logs in SQL Server [duplicate]

Here is my situation: I have being asked to deal with a SQL Server 2008 R2 database that has a transaction log that is several times bigger than the database itself. The database is in full recovery ...
1
vote
1answer
84 views

Getting Time Duration

I have a table like below: I want to get time duration for each record which SPEED is greater than 100. I written a function for that, it’s working fine , but my problem was i have millions of ...
1
vote
1answer
89 views

Adding a “position” number in Mysql

I got the following query and result currently: mysql> SELECT songname,COUNT(*) as count FROM etrstats WHERE songname != '' AND `when` >= DATE_SUB(CURRENT_DATE, INTERVAL 1 MONTH) GROUP BY ...
5
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2answers
10k views

What are some common and useful fields for a users table in a database?

I want to begin implementing user functionality on my website, but I'm not sure exactly what kind of information I should be storing. Obviously the basic things like username, password, password hash, ...
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3answers
660 views

How to load multiple values in cell from Excel to SQL Server many to many table [closed]

I have values in excel like this. StudentNumber| Subjects 1| english, science, maths 2| maths, biology 3| history, zoology I have Student table in database ...
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1answer
6k views

SQL Server 2012 how to create new schema from existing database selecting only subset of database objects?

I'm looking for a way to create new schema from existing database selecting only subset of database objects. I.e. I want to have some "database representation" which only includes subset of tables ...