Recent questions tagged SQL

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This is my table data Student And this is my query -- SELECT id, SUM( maths + chemistry + physics ) AS total ... me know how can i achieve this? 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 enforce unique constraint in MySQL?

I have a MySQL table defined: File -------------------------- ID int(11) PK name varchar(100) ... what else can I do to enforce this constraint? 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 sub query with a comma separated resultset

I need to return records on a table and my result set needs to contain a comma separated list. I have ... in it (comma separated). 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 - Adding a uniqueidentifier column and adding the default to generate new guid

I have the following SQL command: ALTER TABLE dbo.UserProfiles ADD ChatId UniqueIdentifier NOT NULL, UNIQUE(ChatId), ... users already in 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 server 2008 - Is there any good way to debug "String or binary data would be truncated?"

The year is 2010. SQL Server licenses are not cheap. And yet, this error still does not indicate the row or ... " data. Am I missing something? 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 - SQL update query syntax with inner join

Can anyone find my error in this query? I'm using SQL Server 2000 and I want to update all entries in ... (CostCentre, 5, 2) = sOperationCode 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 is the purpose of putting an 'N' in front of function parameters in TSQL?

What is the purpose of putting an 'N' in front of function parameters in TSQL? For example, what does the N ... code: object_id(N'dbo.MyTable') 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 2005 - Way to insert text having ' (apostrophe) into a SQL table

While I was trying the following SQL command , I got sql error. INSERT INTO exampleTbl VALUES('he doesn't work ... apostrophe) into a SQL 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 - Doing a WHERE IN on multiple columns in Postgresql

I have a table 'answers' with an indexed 'problem_id' integer column, a 'times_chosen' integer column, and an ' ... )...) Is this possible? 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 - Empty statement in T-SQL

Is there an empty statement keyword in T-SQL in Sql Server 2005 or newer? Something like NULL statement in PL/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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sql - Is BIGINT(8) the largest integer MySQL can store?

I've got some numbers that is now larger than INT can handle. This is a bit embarrassing, but I honestly don' ... store in MySQL as an integer? 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 - Why can't indexed views have a MAX() aggregate?

I have been trying out a few index views and am impressed but I nearly always need a max or a min as well ... , I'm looking for explanation... 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 use Foreign Key constraints in MySQL?

I was wondering, What will be my motivation to use constraint as foreign key in MySQL, as I am sure that ... added? Does it improve performance? 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 - Pivot Table Using MySQL

I have two tables Triples and Tags Triples Table has the following Columns id PostID TagID Value 1 1 1 Murder ... could not figure out this one 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 Determine Values for Missing Months based on Data of Previous Months in T-SQL

I have a set of transactions occurring at specific points in time: CREATE TABLE Transactions ( TransactionDate Date ... "Smear" sounded worse. See Question&Answers more detail:os...

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

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316 views

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sql server: delete all the rows of all the tables

I'd like to clear the database altogether and reset the data. What's the quickest way to do that? Or, ... that process for all tables)? 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 - Integrity constraint violation in Magento custom module

I have a similar probelm to Integrity constraint violation creating Product in Magento (unanswered) but I am ... occurs. Thanks in advance 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 - Managing date formats differences between PHP and MySQL

I'm writing my first PHP app that has to directly deal with dates, and thus to directly deal with the fact ... more elegant way to manage this? 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 - What could be good ways to deploy ASP.Net Web Applications?

We currently deploy web applications by creating a database and running SQL scripts through query analyzer. ... intervention and automation? 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 should I consider when selecting a data type for my primary key?

When I am creating a new database table, what factors should I take into account for selecting the primary key's data type? 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 do I calculate the last day of the month in SQL?

Specifically MSSQL 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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535 views

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sql server - Count consecutive duplicate values in SQL

I have a table like so ID OrdID Value 1 1 0 2 2 0 3 1 1 4 2 1 5 1 1 6 2 0 7 1 0 8 2 0 9 2 1 10 ... 6, 7 and 8). I am using sql server 2008 r2. 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 - Recursive stored functions in MySQL

I'm trying to make a function that recursively builds a path for a specific category CREATE FUNCTION getPath(inId ... , @temp); SELECT @temp; 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 - Remove trailing empty space in a field content

I am using SQL server MSDE 2000. I have a field called notes of type nvarchar(65). The content is 'Something ' ... any alternate way 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 - Pros and Cons of autoincrement keys on "every table"

We are having a rather long discussion in our company about whether or not to put an autoincrement key on ... millions of records). 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 - RODBC sqlSave table creation problems

I'm having trouble creating a table using RODBC's sqlSave (or, more accurately, writing data to the created table) ... up I'd appreciate 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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421 views

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sql server - Having Troubles with UnixODBC, FreeTDS, and PyODBC

I am having great difficulty getting all three of these to work together in harmony. I guess I'll list all the various ... .args[1]) sys.exit(1) 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 - calling stored procedure from solr

I'm writing an application that searches by solr 3.4. To fill the index of solr I use the dataimporthandler and ... a lot for all your answers! See Question&Answers more detail:os...

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

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