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Finding duplicate values in a SQL table
...een attributes in a relation.
Support is not consistent:
Recent PostgreSQL supports it.
SQL Server (as at SQL Server 2017) still requires all non-aggregated columns in the GROUP BY.
MySQL is unpredictable and you need sql_mode=only_full_group_by:
GROUP BY lname ORDER BY showing wrong results;
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How do I drop a foreign key in SQL Server?
I have created a foreign key (in SQL Server) by:
8 Answers
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SQL Server - inner join when updating [duplicate]
... works with UDPATE SET FROM JOIN WHERE? Does it depend on the version of mysql?
– Farside
Apr 28 '16 at 12:45
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SQL Server : GROUP BY clause to get comma-separated values [duplicate]
... FOR XML PATH('')), 1, 2, '')
FROM your_table a
GROUP BY ReportId
SQL fiddle demo
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I want to use CASE statement to update some records in sql server 2005
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Change auto increment starting number?
In MySQL, I have a table, and I want to set the auto_increment value to 5 instead of 1 . Is this possible and what query statement does this?
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proper hibernate annotation for byte[]
...eger,
java.math.BigDecimal,
java.util.Date,
java.util.Calendar, java.sql.Date,
java.sql.Time, java.sql.Timestamp,
byte[], Byte[], char[], Character[], enums, and any other
type that implements Serializable.
As described in Section 2.8, the use
of the Basic annotation is optional
fo...
SQL Server Index Naming Conventions [closed]
Is there some standard way to name indexes for SQL Server? It seems that the primary key index is named PK_ and non-clustered indexes typically start with IX_. Are there any naming conventions beyond that for unique indexes?
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大数据能否拯救中国足球？ - 资讯 - 清泛网 - 专注C/C++及内核技术
...冰在产品化方面已经完成破冰，目前在toB端和toC端拥有了包括‘职业大师’、‘媒体大师’、‘实时球市APP’、‘创冰DATA’PC端网页和实时数据游戏在内的五大产品线。在中国足球快速发展的大时代下，...
Is there a better way to dynamically build an SQL WHERE clause than by using 1=1 at its beginning?
I'm building some SQL query in C#. It will differ depending on some conditions stored as variables in the code.
22 Answer...