Recent questions tagged SQl

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sql server - Reverse engineering SSIS package using C#

There is a requirement to extract source,destination and column names of source and destination. Why am I trying ... to start with it. 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 - Combine consecutive date ranges

Using SQL Server 2008 R2, I'm trying to combine date ranges into the maximum date range given that one end date ... been able to crack this one. 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 - Order of ANDS in Where clause for greatest performance

My thinking is that if I put my ANDs that filter out a greater number of rows before those that filter ... engines optimized already for 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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sql server - How is a CLR table valued function 'streaming''?

The MSDN Docs on table-valued Sql Clr functions states: Transact-SQL table-valued functions materialize the results of ... to do this lazily? 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 - insert multiple rows using subquery

This is the query: INSERT INTO qualification_lookup (variation, correct_qualification) SELECT (SELECT Qualification FROM student ... to do that. 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 do I find the .NET framework version used in an SSIS 2008 R2 package?

How do I find the .NET framework version used in an SSIS 2008 R2 package? 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 - Laravel Eloquent to join table and count related

How do I use join with Eloquent taking in consideration the following table structure: I have a properies table - ... to get the desired result? 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 INSERT [...] ON CONFLICT be used for foreign key violations?

Given => select * from referenced; referenced_id | name ---------------+------- 1 | one 2 | two ... the existence of the foreign key here too? 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 - Does Oracle have a filtered index concept?

Similar to SQLServer where I can do the following create index TimeSeriesPeriodSs1 on TimeSeriesPeriod (validationStatus, ... = N'Pending' 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 safely store database login and password in a C# application?

I have a C# application that needs to connect to an SQL database to send some data from time to time. How ... and password used for this job? 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 to test if database is hosted on SQL Azure?

Is it possible to test whether a database is hosted on SQL Azure? I am looking at SqlAzureExecutionStrategy ... it was technically possible. 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 ce - Profiler for Sql CE

i wonder if there is something similar to Sql Profiler for Sql Server Compact Edition? i use SqlCE as backend for a ... .. any ideas? thanks j. 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 - DATEDIFF in HH:MM:SS format

I need to calculate the total length in terms of Hours, Minutes, Seconds, and the average length, given some data ... to perform all of 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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sql - For autoincrement fields: MAX(ID) vs TOP 1 ID ORDER BY ID DESC

I want to find the highest AutoIncremented value from a field. (its not being fetched after an insert where I can ... Hope its not a tall 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 - SQLite3 "forgets" to use foreign keys

I'm using Ruby with SQLite3 and my attempts to use foreign keys in Sqlite3 were unfortunately not successful. ... rows with unknown app_ids. 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 - Filtered index condition is ignored by optimizer

Assume I'm running a website that shows funny cat pictures. I have a table called CatPictures with the ... the job of checking DeletionDate? 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 - Backup SQL Schema Only?

I need to create a backup of a SQL Server 2005 Database that's only the structure...no records, just the ... 't work for my purposes, sorry 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 - Select From all tables - MySQL

I have a mySQL database called listDB that contain several tables with column name Product etc. I want to ... right query for this purpose? 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 - Oracle table column name with space

Is it possible to create a table with column name containing space? If so how can I create and use it? 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 - Does limiting a query to one record improve performance

Will limiting a query to one result record, improve performance in a large(ish) MySQL table if the table only has ... will the gain be minimal? 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 - VARCHAR to DECIMAL

I want to convert a varchar(max) column to decimal(10,4). When I try to use cast or convert I am ... other values I am having some problems. See Question&Answers more detail:os...

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

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186 views

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sql server - SQL join following foreign key: statically check that LHS is key-preserved

Often you join two tables following their foreign key, so that the row in the RHS table will always be found. ... SQL Server for the pedantic) See Question&Answers more detail:os...

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

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252 views

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sql - Concatenate one field after GROUP BY

This question have been asked many times in SO but none of the answers is satisfying to my situation. Question ... , [DeletedTime], [DeletedBy] See Question&Answers more detail:os...

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

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280 views

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sql - Using MySQL sort varchar column numerically with cast as unsigned when the column can begin or end with letters

I've ran into something I'm not really sure how to handle here. I'm building a database to store information ... 3 2016 Topps 2a 2016 Topps 2b See Question&Answers more detail:os...

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

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266 views

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sql server - Ways to validate T-SQL queries?

I have access to an Access database and within that database are fields filled with TSQL queries. These queries are ... wouldn't expect it to. See Question&Answers more detail:os...

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

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226 views

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sql - How do I find the total number of used days in a month?

I am arriving at the total number of days a service has been used in a month. (Start_Date and End_Date are - ... , preferable in SQL to PLSQL. See Question&Answers more detail:os...

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

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339 views

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sql - mysql count performance

select count(*) from mytable; select count(table_id) from mytable; //table_id is the primary_key both query were ... but didn't help much. See Question&Answers more detail:os...

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

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278 views

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sql - Increase Ms Access Insert Performance

I am using MS Access 2010, split in front end / back end; on a network drive (WAN) with 16+ table with ... didnt impact much on the time factor. See Question&Answers more detail:os...

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

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