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change datatype

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change datatype MySQL Help forum discussing administration, SQL syntax, and other MySQL-related topics. MySQL is an open-source relational database management system (RDBMS).

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  #1  
Old March 7th, 2000, 07:32 AM
hkccm hkccm is offline
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I have already assigned a DATATYPE
eg.

userid VARCHAR(20)

now, I want to change it to VARCHAR(40)

what should i type in MySQL?
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  #2  
Old March 7th, 2000, 07:34 AM
Kyuzo Kyuzo is offline
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ALTER table table_name
MODIFY userid varchar(40);
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Old March 7th, 2000, 07:35 AM
masood masood is offline
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alter table TABLENAME change column userid varchar(40)

something like that. check the manual for correct syntax...
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