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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0answers
345 views

sql query takes too long to execute [closed]

I am having trouble with this query. It takes 10 hours to execute. WITH CONSUM AS ( SELECT C.ID_MEASURER,C.ID_MEASURING_POINT,C.CONSUM_TYPE FROM GCGT_RE_CONSUM_H_E C WHERE C.DAY ...
1
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0answers
90 views

One table for article comments, video comments and photo comments or multiple tables?

First DBA question. Greetings people. I hope I'm not duplicating a question but it's very hard finding database design related questions here (for multiple comment tables), as all 'design' questions ...
1
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2answers
121 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 ...
0
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1answer
90 views

User defined data types causing implicit conversions

user defined datatypes, i'm looking at some execution plans and seeing implicit conversions happening in the background when a var is declared of type user defined data type and pulling a value into ...
3
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4answers
301 views

Best practice for a Table with private columns

I have a table with user data, where most of the columns can be public or private (so it will be shown or not on the app) and every user can decide which fields to hide. So far I had a couple of ...
0
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1answer
67 views

Compare dates in Oracle SQL [closed]

I have a table LoanDeadline that has a column called deadline, it's simple text and not Date and it's in the format of July 25, 2014 How do I compare this with sysdate ? So far I have SELECT ...
0
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2answers
46 views

assign selected columns to a variable

Select sum(column_a) as a, sum(column_b) as b round(a / b) From table Group by column In the example above I am summing two column, and I would like to use those 2 results in calculating ...
0
votes
1answer
353 views

How do I count the number of different child id's belonging to a parent record?

For instance I have two tables in a music database. Table album and table track. Each track record has (amongst other things), an album_id and an artist_id Each album record has a unique album_id ...
1
vote
1answer
64 views

Does PostgreSQL allow multiple grantees in GRANT commands?

Looking at the PostgreSQL docs it seems that the GRANT command only grants to a single user or role. In fact it doesn't seem to be PostgreSQL alone. Isn't possible to do something like GRANT SELECT ...
-3
votes
3answers
240 views

SQL cache hit ratio [closed]

I have install SQL server, but when i check report of DB there is cache hit ratio which is 98.92%. Is it harmful for sql, if yes then how to reduce it.....? please give me solution for that. thanks, ...
0
votes
3answers
242 views

Suppress display in a column if the value is equal to the value in another column

I have 2 date columns that display side-by-side. I have some dates that are equal. I do not want to display the "equal" dates/duplicate date values in one of the columns. How do I do that? Example ...
0
votes
1answer
145 views

Script to Add a Job to a SQL Server DB

I want to add a job to my DB to make a back up weekly but i want to do it from an script, i've serched and with what i found i made this: CREATE SCHEMA job go CREATE PROC BACKUPS @dir varchar(max) AS ...
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1answer
39 views

Combine 2 tables

I am wanting to combine 2 tables. until recently the column names were different , and one had fewer columns than the other, however it was deemed unnecessary to have them as two tables. I have ...
0
votes
1answer
35 views

SQL where clause effect on table? [closed]

I have sql query as select sourceIP, sum(sourceBytes) from flows group by sourceIP order by sum(sourceBytes) desc This brings result (dummy) as:- sourceIp SourceBytes 192.168.1.2 100 ...
3
votes
1answer
84 views

Postgresql query plan differs with limit value making the query slower for lower limits

I have this query: SELECT "table_1".* FROM "table_1" WHERE "table_1"."deleted_at" IS NULL AND "table_1"."table_2_id" = 15797104 ORDER BY "table_1"."id" ASC LIMIT 1 The explain for the query ...
0
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1answer
39 views

MySQL Insert with Select

Trying to insert data to a table with values from different tables. INSERT INTO class_teachers_section(class_ref, teachers_ref, section_ref) select (select class.id as class_ref from class ...
2
votes
2answers
202 views

Should I drop a foreign key if I use a soft delete?

"ON UPDATE" scenario never happens in my application. As soft delete is used, "ON DELETE" cascade and restrict scenario never happen as well now. Then, should I just drop foreign key because I have ...
0
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0answers
159 views

Implicit conversion from data type varchar to varbinary is not allowed. Use the CONVERT function to run this query

While I am executing a query, I am getting the below error: Implicit conversion from data type varchar to varbinary is not allowed. Use the CONVERT function to run this query My query is: ...
0
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1answer
53 views

Is it possible to create a function in SQL server to act as clause e.g. Where or Limit

I've found a simple way to mimic the limit clause is SQL server by using SELECT * FROM customers OFFSET 22 ROWS FETCH NEXT 5 ROWS ONLY I'd like to replace those two line with LIMIT(22, 5) e.g. ...
1
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1answer
60 views

add a column to an existing table

I'm wanting the best way to add a column to an existing table in my database. I'm using SQL Server 2012. I don't want the data that is in the table to be affected, I just want to add a new column ...
0
votes
1answer
84 views

change column name

I'm needing to update a few column names in some tables I have in my database. I'm using SQL Server 2012. I'm aware of using the RENAME ability: ALTER TABLE table_name RENAME COLUMN old_name to ...
1
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1answer
235 views

Selecting data from multiple rows and insert it into a column

My table is like this: temp1 name city phone_no pincode ----------------------------------- amit Delhi 12345 123 Rajiv Bombay 836536 432 How do I transform the last ...
0
votes
2answers
779 views

Set default value for all columns with specific name within a database

I've got a database that includes an int column project_id on many tables, and I want to script setting the default value to a specific value for all columns with that name in the database. Note that ...
0
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3answers
88 views

Prevent auto commit of DROP without SET AUTOCOMMIT OFF

I dropped my table and I lost my data and I can't roll it back because DROP statement automatically commits. How can I prevent auto commit action of DROP without using SET AUTOCOMMIT OFF?
0
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1answer
72 views

How to install/enable DAX functions in SQL Server [closed]

How to install/enable DAX functions in SQL Server? I want to pivot and use some Excel functions in SQL Server
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1answer
166 views

MySQL select with left join query

I have following code. select class.name as classname, class.hours as hours, teachers.first_name as teacherFirstName, teachers.last_name as teacherLastName from teachers,class left join ...
1
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1answer
655 views

MS Access query-by-form opening query, but not running it with new form data

I have created a query-by-form in MS Access. The form has a text field for each field in my table. I'm only using one starting out to test. The query criteria for that field is Like "*" & ...
1
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1answer
29 views

How to apply a newly-created Domain to an existing Column?

In Postgres 9.4 Beta 1, I successfully created a domain of type VARCHAR, fuel_domain_. The domain checks that a value is any of 5 possible strings, coal, gas, wind, hydro, other. CREATE DOMAIN ...
3
votes
1answer
1k views

Split comma separated entries to rows

I have a Table like this: | ID | OtherID | Data +--------+-----------+--------------------------- | 5059 | 73831 | 5103,5107 | 5059 | 73941 | 5103,5104,5107 | 5059 | 73974 | ...
0
votes
1answer
30 views

move content from one table to another table and add a new value

I need to move content from one table to another table, this part is done: INSERT INTO `insc_mwc` (`nome`,`empresa_idempresa`,`cat_mwc_idcat`,`points_pontos`,`n_registo`) SELECT ...
0
votes
1answer
628 views

How to select non unique values from 1 column if a value doesn't exist in column 2

I have a table containing (among other things) 2 integer values, neither of which are unique. See below for example data: --------------- | a | b | --------------- | 1 | 1 | ...
5
votes
2answers
1k views

Pagination with PostgreSQL 9.3: counting number of pages

I'm implementing pagination and sorting of rows in, let's say, products table, using multicolumn index on category, score and id. -- index create index category_score_id on products(category, score, ...
1
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1answer
108 views

MYSQL Query - Unexpected result in text messaging database [closed]

On a text messaging database I have built, I am trying to return the total amount of messages a user has sent and the total number of messages a user has received. I have the following code: SELECT ...
0
votes
0answers
100 views

MySQL: Select a subset/range of a result

Assuming there's an application for running events (marathons etc.). An event (i.e. a run) has an ID and serveral segments, divided by checkpoints. So here's what we might get: SELECT * FROM segments ...
2
votes
1answer
528 views

Slow Performance of Parametrized Query in Excel due to Parameter Datatype

I'm pulling Data from a SQL Server 2008 into Excel using a Parametrized ODBC Query created by the Excel Wizard. (Data-->getExternalData/FromOtherSources-->FromDataConnectionWizard-->ODBC DSN) My ...
1
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3answers
536 views

check if tables has same columns

I have a Database that creates day tables and some of the tables don't have the same number of columns and in some cases the columns aren't the same. What I'm needing to do is consolidate all the ...
0
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0answers
76 views

Index Tuning Question

I have the following query: SELECT T1.ITEMID, T1.ITEMTYPE, T1.PURCHMODEL, T1.HEIGHT, T1.WIDTH, T1.SALESMODEL, T1.COSTGROUPID, T1.REQGROUPID, T1.EPCMANAGER, ...
0
votes
1answer
44 views

MySQL: What is SQL profiler, does it different for MySQL?

Whenever SQL profiling comes in mind, focus goes to two below sections: GUI tools like - MONyog, Neor Profile SQL set profiling =1; Execute Query; show profiles; show profile; I am really confuse ...
1
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1answer
59 views

Detect data spikes (loops) in MySQL database and ignore these

i must create some statistics out of a WWW access log database, but i found out that there are some redirect loops after a login if the user has disabled cookies. So there are 10-1000 mostly identical ...
0
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0answers
18 views

Multiple Trace Files or Replay

I am just wondering how useful the replay functionality of SQL profiler is. The issue I have is that I can capture a workload from production with little overhead, however I would not be able to ...
2
votes
1answer
2k views

MySQL: Which join is better between left outer join and inner join

Which join is better peforming if all of them provides the same result? For example, I have a two tables employees(emp_id,name, address, designation, age, sex) and work_log(emp_id,date,hours_wored). ...
1
vote
1answer
3k 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 ...
1
vote
1answer
310 views

PostgreSQL 9.3 - Performance Issue: Counting table entries slower with jdbc postgres driver

I'm using PostgreSQL 9.3 and want to ask if it is possible to improve the performance of my queries based on the following database schema: CREATE TABLE "entities" ( "id" BIGSERIAL, "type" INT ...
1
vote
1answer
1k views

Combining count queries into one table row

I'm banging my head against the wall because I'm sure this is super easy. I have a few queries set up that get counts for a few related tables. This is for an arcade game tracking system. The ...
1
vote
1answer
4k views

Cannot open database “user_auth.mdf” requested by the login. The login failed. Login failed for user 'web_user'

I am trying to deploy my first VB.NET application on GODADDY. I created a SQL server database and was able to create tables using SQL Server Management Studio. I created a user web_user and was able ...
1
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1answer
77 views

Any way to get database data back?

So I've entered a couple hundred rows of data into a database manually and have begun implementing a Java frontend. However, I got an unexpected result and now when I go back into RazorSQL, the ...
0
votes
1answer
187 views

sql expiry date use Trigger OR Schedule a Job

I have this table : Now, i like the way when the date expires. EndTime < GETDATE() expire field is true. What method should I use? use a trigger to true or a schedule job that run before run ...
1
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1answer
148 views

Execution Plan in Microsoft SQL Server

I have a stored procedure in my database. As per my knowledge it's pre-compiled subroutine. Question 1: If I execute following queries from Hibernate, will database create a separate execution plan ...
0
votes
0answers
258 views

Updating +150,000 rows using .sql file causes ERROR 2013 Lost connection to MySQL server during query

I am using ubuntu 12.04. I have a .sql file that is around 5 megabytes. When I use the command: mysql -u -p -v database query.sql The server prints out the content of the file (because of --verbose) ...
2
votes
2answers
56 views

Strategy to find the unique bivariate polynomials

I have table that stores Tutte polynomials of a large set of graphs. These are bivariate polynomials with integer coefficients. An example of a polynomial taken from Wikipedia is: Since the ...