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What is “with (nolock)” in SQL Server?
...ed at once than because of a uncommitted read from a database.
That said, SQL Server 2005 fixed most of the bugs that made NOLOCK necessary. So unless you are using SQL Server 2000 or earlier, you shouldn't need it.
Further Reading
Row-Level Versioning
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How do I specify “close existing connections” in sql script
I'm doing active development on my schema in SQL Server 2008 and frequently want to rerun my drop/create database script. When I run
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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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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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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...
How to change a table name using an SQL query?
...
In MySQL :-
RENAME TABLE `Stu Table` TO `Stu Table_10`
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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.
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使用App Inventor扩展实现多点触控：Rotation Detector · App Inventor 2 中文网
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