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- www.pythian.com
  
  TEXT vs. VARCHAR - Pythian
  
  2010年1月20日 - MySQL does not allow TEXT data types to have a default value other than NULL. VARCHAR fields are allowed to be created with a DEFAULT ...
  
  2024-04-23
  
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- msdn.microsoft.com
  
  char 和 varchar (Transact-SQL)
  
  這些是固定長度或可變長度的字串資料類型。 ... 轉換成近似 numeric 資料類型的字元運算式可以包含選擇性的指數標記法 (小寫 e 或大寫 E 後面跟著選擇性的加號 (+) 或減號 (-)，再接著數字)。
  
  2024-04-19
  
  瀏覽：1326

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TEXT vs. VARCHAR - Database, Big Data, Infrastructure, Managed Services, Consulti

日期：2024-04-17

On first glance, it looks like TEXT and VARCHAR can store the same information. There are fundamental differences between the them. I explain them here. ... Domas — I’m not confused — Darius said: InnoDB only stores VARCHAR and TEXT within the same ......

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MySQL: Large VARCHAR vs. TEXT? - Stack Overflow

日期：2024-04-21

Disclaimer: I'm not a MySQL expert ... but this is my understanding of the issues. I think TEXT is stored outside the mysql row, while I think VARCHAR is stored as part of the row. There is a maximum row length for mysql rows .. so you can limit how much ...

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SQL Server Text type vs. varchar data type - Stack Overflow

日期：2024-04-23

In SQL server 2005 new datatypes were introduced: varchar(max) and nvarchar(max) They have the advantages of the old text type: they can contain op to 2GB of data, but they also have most of the advantages of varchar and nvarchar. Among these advantages a...

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MySQL: TEXT vs. VARCHAR Performance | NicJ.net

日期：2024-04-24

Starting with MySQL 5.0.3, the maximum field length for VARCHAR fields was increased from 255 characters to 65,535 characters. This is good news, as VARCHAR fields, as opposed to TEXT fields, are stored in-row for the MyISAM storage engine (InnoDB has ......

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varchar vs char - DB2 Database

日期：2024-04-18

varchar vs char. DB2 Database Forums on Bytes. ... Serge Rielau wrote: DB2SQL, That is not correct for DB2 UDB for LUW (I can't comment on DB2 z/OS and DB2 AS/400 internals). DB2 for LUW will, for each row, only allocate the two bytes length, a...

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Performance comparison of varchar(max) vs. varchar(N)

日期：2024-04-20

Author: Remus Rusanu Subject:SQL Server Blog ... The question of comparing the MAX types (VARCHAR, NVARCHAR, VARBINARY) with their non-max counterparts is often asked, but the answer usually gravitate around the storage differences....

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ntext、text 和 image (Transact-SQL)

日期：2024-04-18

重要事項在未來的 Microsoft SQL Server 版本中，將移除 ntext、text 和 image 等資料類型。請避免在新的開發工作中使用這些資料類型，並規劃修改目前在使用這些資料類型的應用程式。請改用 nvarchar(max)、varchar(max) 和 varbinary(max)。...

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PostgreSQL: Don't Use CHAR or VARCHAR

日期：2024-04-18

Earlier this week, while browsing some stack overflow questions about postgres' textual data types, I came across a link to a set of benchmarks that compare the performance of the CHAR, VARCHAR, and TEXT types in PostgreSQL — I highly recommend reading .....

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