Recent questions tagged SQL

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sql server - The database owner SID recorded in the master database differs from the database owner SID

When I try to install tSQLt onto an existing database i get the following error: The database owner SID ... the ALTER AUTHORIZATION statement. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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sql - mysql delete under safe mode

I have a table instructor and I want to delete the records that have salary in a range An intuitive way is ... work under safe mode? Thanks! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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sql - How to detect if a stored procedure already exists

I have to write a deployment script which will work if a stored procedure exists or does not exist. i.e. if it ... . I am using SQL Server 2005 See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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sql - Insert Data Into Temp Table with Query

I have an existing query that outputs current data, and I would like to insert it into a Temp table, but am having ... ,'%') into a temp table? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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sql - How do I join the most recent row in one table to another table?

I have data that looks like this: entities id name 1 Apple 2 Orange 3 Banana Periodically, a process will ... Answer selected. Thanks everyone! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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sql - MySQL - How to count all rows per table in one query

Is there a way to query the DB to find out how many rows there are in all the tables? i.e. table1 1234 ... 222 table3 7888 Hope you can advise See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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sql - How to design a database schema to support tagging with categories?

I am trying to so something like Database Design for Tagging, except each of my tags are grouped into categories ... example is just an example. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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sql server - How to kill/stop a long SQL query immediately?

I am using SQL server 2008 and its management studio. I executed a query that yields many rows. I tried to ... do I stop it immediately ? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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sql - How can I append a string to an existing field in MySQL?

I want to update the code on all my record to what they currently are plus _standard any ideas? So ... -- 1 apple_1_standard 1 apple_2_standard See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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sql - Clustered vs Non-Clustered

My lower level knowledge of SQL (Server 2008) is limited, and is now being challanged by our DBAs. Let me ... . Hope someone can help me. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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sql - Database schema for organizing historical stock data

I'm creating a database schema for storing historical stock data. I currently have a schema as show below. ... where the timeframeID matches. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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sql - What do the mysql workbench column icons mean

In MySQL Workbench, when you edit a table, by each column name, there is a colored diamond. Where can I ... that explains what each color means? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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475 views

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sql - Update or Insert (multiple rows and columns) from subquery in PostgreSQL

I'm trying to do something like this in postgres: UPDATE table1 SET (col1, col2) = (SELECT col2, col3 ... can easily fetch the prepared data. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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sql server - How to remove a column from an existing table?

How to remove a column from an existing table? I have a table MEN with Fname and Lname I need to remove the Lname How to do it? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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sql - Why are joins bad when considering scalability?

Why are joins bad or 'slow'. I know i heard this more then once. I found this quote The problem is joins are ... a PK. Why are they 'slow'? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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335 views

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sql - How can I copy data from one column to another in the same table?

Is it possible to copy data from column A to column B for all records in a table in SQL? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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544 views

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sql server - Table-Valued Function(TVF) vs. View

What's the difference between table-valued functions and views? Is there something you can do with 1 that' ... the difference lie in efficiency? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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sql - Can I use multiple "with"?

Just for example: With DependencedIncidents AS ( SELECT INC.[RecTime],INC.[SQL] AS [str] FROM ( SELECT A.[RecTime ... I need to use temp tables? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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508 views

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sql - Right query to get the current number of connections in a PostgreSQL DB

Which of the following two is more accurate? select numbackends from pg_stat_database; select count(*) from pg_stat_activity; See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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sql - ALTER DATABASE failed because a lock could not be placed on database

I need to restart a database because some processes are not working. My plan is to take it offline and back online ... . What am I doing wrong? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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518 views

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sql - Group query results by month and year in postgresql

I have the following database table on a Postgres server: id date Product Sales 1245 01/04/2013 Toys 1000 1245 01/ ... a simple way to do that? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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364 views

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sql - postgresql list and order tables by size

How can I list all the tables of a PostgreSQL database and order them by size? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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312 views

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sql - Are Databases and Functional Programming at odds?

I've been a web developer for some time now, and have recently started learning some functional programming. ... development see this question. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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348 views

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sql - Oracle find a constraint

I have a constraint called users.SYS_C00381400. How do I find what that constraint is? Is there a way to query all constraints? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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sql - How to remove certain results from my search count?

I received a few irrelevant results to my count that I would like to remove from my output. When using only the first "where ... 2 d 3 g 4 h 5 i See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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357 views

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sql - Cursor in procedure returning more values than query

I am using a simple cursor in a procedure that receives a couple of parameters. I then make a cursor on a ... my cursor returns %rowcount is 10. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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342 views

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sql - Select top rows until value in specific column has appeared twice

I have the following query where I am trying to select all records, ordered by date, until the second time ... columns to show my calculations. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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304 views

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sql - postgresql 9.4 - prevent app selecting always the latest updated rows

I have a (Ruby on Rails 4) app and using a postgresql query that basically look into a Opportunity ... updated are all Winning opportunities. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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