Recent questions tagged Sql

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sql - Find records where join doesn't exist

I have a scope to limit all questions by whether or not a user has voted on them. In the model: scope : ... records where a join doesn't exist? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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sql - How to get a list of months between two dates in mysql

I hve to get the list of months between two dates in mysql. For Example:My Input is From date 23-01-2013 To ... Feb 2014, Mar 2014, Apr 2014. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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sql server - How do I remove extended ASCII characters from a string in T-SQL?

I need to filter out (remove) extended ASCII characters from a SELECT statement in T-SQL. I'm using a stored ... .NET Framework 4.0.30319.17929 See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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sql server - Comma Separated values with SQL Query

My SQL table is like following City_Code Post_Code Post_Code_Description 100 A1 ABC 100 C8 XYZ 100 Z3 MNO 200 D4 ... SQL table is like following See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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sql - Table or column name cannot start with numeric?

I tried to create table named 15909434_user with syntax like below: CREATE TABLE 15909434_user ( ... ) It ... in advance for your attention! See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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sql - MySQL: LAST_INSERT_ID() returns 0

I've got this test table: CREATE TABLE IF NOT EXISTS `test` ( `id` INT(10) AUTO_INCREMENT, PRIMARY KEY (`id`) ... can't get it to work. Ideas? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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sql server - Benefits Of Using SQL Ordinal Position Notation?

Background Information Ordinal position notation, AKA ordinals, is column shorthand based on the column order in the ... topic of interest. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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sql server - When to use EXCEPT as opposed to NOT EXISTS in Transact SQL?

I just recently learned of the existence of the new "EXCEPT" clause in SQL Server (a bit late, I know ... for using this powerful tool? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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sql server 2008 - T-SQL substring - separating first and last name

I have a column which has FirstName and LastName together. I'm writing a report to separate the FirstName And ... LastName separated in T-SQL? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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sql - mySQL query to search all tables within a database for a string?

Is there a mySQL query to search all tables within a database? If not can you search all tables within a ... details are in different tables. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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sql server - Full text search does not work if stop word is included even though stop word list is empty

I would like to be able to search every word so I have cleared the stop word list. Than I have rebuilt ... Server 2012 Express. Thanks a lot! See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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sql server - Why does a parameterized query produces vastly slower query plan vs non-parameterized query

In a SQL Server 2005 database I'm working on this query: select * from foo join bar on bar.x = ... Literal Query Plan Parameterized Query Plan See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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sql server - How do I select last 5 rows in a table without sorting?

I want to select the last 5 records from a table in SQL Server without arranging the table in ascending or descending order. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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sql - How to get Return Value of a Stored Procedure

Probably an easy-to-answer question. I have this procedure: CREATE PROCEDURE [dbo].[AccountExists] @UserName nvarchar ... ELSE --insert acocunt See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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sql server - Stored procedure - return identity as output parameter or scalar

When you insert a record into a table with an identity column, you can use SCOPE_IDENTITY() to get that value. ... ? Any pros/cons to each? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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259 views

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sql server - SSMS version 18 – no Database Diagrams

I notice that Database Diagrams are not supported in SSMS version 18, any idea why, and is there a way to get ... the T-SQL debugger gone now? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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sql - Can an INNER JOIN offer better performance than EXISTS

I've been investigating making performance improvements on a series of procedures, and recently a colleague mentioned ... be much appreciated. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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295 views

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sql - Empty IN clause parameter list in MySQL

What happens when you do a SQL query where the IN clause is empty? For example: SELECT user WHERE id IN ... building the IN clause dynamically? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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276 views

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sql server 2008 - T-SQL and the WHERE LIKE %Parameter% clause

I was trying to write a statement which uses the WHERE LIKE '%text%' clause, but I am not receiving ... Any suggestions? Thanks in advance. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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sql - selecting top N rows for each group in a table

I am facing a very common issue regarding "Selecting top N rows for each group in a table". Consider a table ... What's the solution to this? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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424 views

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sql - Using pivot on multiple columns of an Oracle row

I have the following sample data in an Oracle table (tab1) and I am trying to convert rows to columns. I know ... . Can it be done using pivot? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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283 views

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sql server - Making an Entity Framework Model span multiple databases

Is it valid to do something such as CREATE SYNONYM [dbo].[MyTable] FOR [AnotherDatabase].dbo.[MyTable] and ... synonyms and merging edmx files. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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567 views

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sql - Oracle - How to create a materialized view with FAST REFRESH and JOINS

So I'm pretty sure Oracle supports this, so I have no idea what I'm doing wrong. This code works: CREATE ... Oracle manuals to no avail. Thanks! See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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sql - How to see all the tables in an HSQLDB database?

I usually use SQLDeveloper to browse the database, but I couldn't make it work with HSQLDB and I don't know which ... so I can drop/alter them? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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263 views

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sql - Can a stored procedure/function return a table?

Can a MySql stored procedure / function return a table without the use of temp table? Creating the following procedure ... and if so - how? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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181 views

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sql server - How do I create a multiple-table check constraint?

Please imagine this small database... Diagram removed dead ImageShack link - volunteer database diagram Tables ... the same volunteer? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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222 views

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sql server - What does "ORDER BY (SELECT NULL)" mean?

The following SQL is from Itzik Ben-Gan that is used to generate a numbers table. What does the order by ( ... SELECT * FROM numbers; Thanks! See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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449 views

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sql - TSQL - How to use GO inside of a BEGIN .. END block?

I am generating a script for automatically migrating changes from multiple development databases to staging/production. ... single IF block? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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