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  • 修改Sql Server字段类型

    由于人员的不段增加varchar(5000)已经不能满足需求,现在的方案是把字段类型由varchar改为text

    1 --修改短信人员字段
    2 alter table T_BAS_SendMessage alter column [Content] text
    3 alter table T_BAS_SendMessage alter column ReceiveInsideName text
    4 alter table T_BAS_SendMessage alter column ReceiveInsideLoginName text
    5 alter table T_BAS_SendMessage alter column ReceiveOutsideName text
    6 alter table T_BAS_SendMessage alter column ReceiveOutsidePhone text
    7 alter table T_BAS_SendMessage alter column WeChatUniqueLogo text
    8 alter table T_BAS_SendMessage alter column WeChatNumber text
    9 go
    View Code

    微软的说法是用这个数据类型来代替之前的textntextimage 数据类型,它们之间的对应关系为:

    varchar(max)-------text;

    nvarchar(max)-----ntext;

    varbinary(max)----image.

    建议使用varchar(max)代替text

    1 alter table T_BAS_SendMessage alter column [Content] varchar(max)
    2 alter table T_BAS_SendMessage alter column ReceiveInsideName varchar(max)
    3 alter table T_BAS_SendMessage alter column ReceiveInsideLoginName varchar(max)
    4 alter table T_BAS_SendMessage alter column ReceiveOutsideName varchar(max)
    5 alter table T_BAS_SendMessage alter column ReceiveOutsidePhone varchar(max)
    6 alter table T_BAS_SendMessage alter column WeChatUniqueLogo varchar(max)
    7 alter table T_BAS_SendMessage alter column WeChatNumber varchar(max)
    8 go
    View Code
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  • 原文地址:https://www.cnblogs.com/yidengbone/p/6594577.html
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