varchar

English

From the data type name, a shortening of variable character.

varchar (plural varchars)

(computing, databases) A text field of indeterminate length in a database, as opposed to the traditional fixed-length field.
- 1999, David K. Rensin, Andrew M. Fedorchek, William C. Amo, Microsoft SQL Server 7 secrets
  Be aware that varchars will in general provide slower updates but faster selects. By definition, the amount of storage they use is variable.
- 2008, Eric Johnson, Joshua Jones, A Developer's Guide to Data Modeling for SQL Server
  With a varchar, the storage is always the actual number of characters you have stored plus 2 bytes. So a varchar(20) with a 5-character word will take up 7 bytes, with the extra 2 bytes holding a size reference for SQL Server.

单词	varchar
释义	varchar English Etymology From the data type name, a shortening of variable character. Pronunciation (UK) IPA^(key): /ˈvɑːt͡ʃɑː/ (US) IPA^(key): /ˈvɑɹt͡ʃɑɹ/, /ˈvɛ(ə)ɹkɛ(ə)ɹ/ Noun varchar (plural varchars) (computing, databases) A text field of indeterminate length in a database, as opposed to the traditional fixed-length field. 1999, David K. Rensin, Andrew M. Fedorchek, William C. Amo, Microsoft SQL Server 7 secrets Be aware that varchars will in general provide slower updates but faster selects. By definition, the amount of storage they use is variable. 2008, Eric Johnson, Joshua Jones, A Developer's Guide to Data Modeling for SQL Server With a varchar, the storage is always the actual number of characters you have stored plus 2 bytes. So a varchar(20) with a 5-character word will take up 7 bytes, with the extra 2 bytes holding a size reference for SQL Server.
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