Recent questions tagged SQl

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sql - How to group mysql rows with same column value into one row?

I have two tables, keywords and data. Table keywords have 2 columns (id, keyword), table data have 3 columns ( ... be able to sort the values. 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 can I check if an SQL result contains a newline character?

I have a varchar column that contains the string lol cats, however, in SQL Management Studio it shows up as lol cats ... if the is there or not? 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 - Select rows with same id but different value in another column

I tried for hours and read many posts but I still can't figure out how to handle this request: I have a table like 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 - How to use order by with union all in sql?

I tried the sql query given below: SELECT * FROM (SELECT * FROM TABLE_A ORDER BY COLUMN_1)DUMMY_TABLE UNION ALL ... How do I accomplish 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 add a column and make it a foreign key in single MySQL statement?

In mysql, can I add a column and foreign key in the same statement? And what is the proper syntax for adding ... ON DELETE CASCADE' at line 4 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 - MS SQL compare dates?

I have 2 dates (datetimes): date1 = 2010-12-31 15:13:48.593 date2 = 2010-12-31 00:00:00.000 Its the ... same? Its SQL Server 2008. 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 - INSERT vs INSERT INTO

I have been working with T-SQL in MS SQL for some time now and somehow whenever I have to insert ... other implementations of SQL 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 - Flatten Adjacency List Hierarchy To A List Of All Paths

I have a Table that stores Hierarchical information using the Adjacency List model. (uses a self referential key - ... for n-tier hierarchies. 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 - Window functions to count distinct records

The query below is based on a complicated view and the view works as I want it to (I'm not going to ... Can it be done using window functions? 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 - PostgreSQL: Full Text Search - How to search partial words?

Following a question posted here about how I can increase the speed on one of my SQL Search methods, I ... can achieve this ? Regards Anthoni 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 - MS SQL 2008 - get all table names and their row counts in a DB

I'm trying to identify which tables are affected by a data update though an application (developed by others). ... number of rows as well? 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's the best way to dedupe a table?

I've seen a couple of solutions for this, but I'm wondering what the best and most efficient way is to de- ... in everything but the PK field.) 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 - Re-order columns of table in Oracle

I have a table with 50+ columns and I need to swap the order of the first two columns. What is the ... thoughts/opinions on this are irrelevent. 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 a stored procedure in Oracle with IN and OUT parameters

I have this procedure: CREATE OR REPLACE PROCEDURE PROC1(invoicenr IN NUMBER, amnt OUT NUMBER) AS BEGIN SELECT ... INVOICE_NR equal to 1000001. 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 change the data type of a column without dropping the column with query?

I have a column which has a datatype : datetime. But now i want to convert it to datatype varchar. Can i ... If yes, then please explain how? 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 a foreign key refer to a primary key in the same table?

I just think that the answer is false because the foreign key doesn't have uniqueness property. But some people said ... join. What is its use? 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 - Indexing boolean fields

This is probably a really stupid question, but is there going to be much benefit in indexing a boolean field ... fields in a different index? 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 do a simple 'Find and Replace" in MsSQL?

Question is pretty self explanitory. I want to do a simple find and replace, like you would in a text editor ... on MS Windows server 2003) 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 - Division ( / ) not giving my answer in postgresql

I have a table software and columns in it as dev_cost, sell_cost. If dev_cost is 16000 and sell_cost is 7500. ... for that? 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 - Select Row number in postgres

How to select row number in postgres. I tried this: select row_number() over (ORDER BY ... (ORDER BY cgcode_odc_mapping_id)as 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 - Many to Many Relation Design - Intersection Table Design

I'm wondering what a better design is for the intersection table for a many-to-many relationship. The two ... 1 1 --Cyclical reference! See Question&Answers more detail:os...

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

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313 views

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sql - How can I analyse a Sqlite query execution?

I have a Sqlite database which I want to check the indexes are correct. MS SQL Analyser is great at breaking ... a similar tool for Sqlite? 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 - ORA-00054: resource busy and acquire with NOWAIT specified

I killed a script that was in the middle of updating a table. Now when I rerun the script I am getting, ORA ... the table?. 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 server - How to detect SqlServer connection leaks in a ASP.net applications?

I'm currently doing some GUI testing on a ASP.net 2.0 application. The RDBMS is SQL Server 2005. The host ... the variables that I should watch? 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 - Update Collation of all fields in database on the fly

We recently moved our database from our SQL Server 2005 server to our SQL Server 2008 server. Everything moved ... to get it working correctly. See Question&Answers more detail:os...

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

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321 views

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sql - How do I clear oracle execution plan cache for benchmarking?

On oracle 10gr2, I have several sql queries that I am comparing performance. But after their first run, the v$sql ... able to delete from view. See Question&Answers more detail:os...

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

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282 views

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sql - Getting results between two dates in PostgreSQL

I have the following table: +-----------+-----------+------------+----------+ | id | user_id | ... = "2012-04-09" and end_date = "2012-04-13". See Question&Answers more detail:os...

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

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349 views

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sql - Grant privileges on future tables in PostgreSQL?

I am running PostgreSQL 9.3.1. I have test database and backup user which is used to backup the database. I ... making user owner of the 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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