varchar

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mysql datatypes

Most of the tables in my db have data of type varchar and length set as 36 used to fill natively created guids. Is varchar the most suitable da开发者_如何转开发ta type to store guid values or any othe[详细]

2023-02-04 08:40 分类：问答
Field/Data Type to Store Articles in MySQL Database

I can\'t help but believe this topic has been written about over and over again but I\'m having trouble finding any good, solid information.[详细]

2023-02-01 05:58 分类：问答
PostgreSQL primary key length limit

What is the limit of the length of primary key column? I\'m going to use varchar as primary key. I\'ve found no info, how long it can be, since PostgreSQL does not require to specify varchar limit whe[详细]

2023-02-01 02:51 分类：问答
String data, right truncation in SQLSRV PHP Driver ("donut hole")

I\'m writing large-ish amounts of text to a text column using Microsoft\'s sqlsrv PHP driver (on a Windows 2003 server).[详细]

2023-01-28 23:31 分类：问答
Does VARCHAR size limit matter? [duplicate]

This question already has answers here: Closed 12 years ago. Possible Duplicate: Importance of varchar length in MySQL table[详细]

2023-01-27 15:26 分类：问答
mysql int fields does not truncate

as all you know, when you describe varchar or integer fields you should set the length of them... something like int(5) or varchar(5)...[详细]

2023-01-27 02:21 分类：问答
InnoDB: Changing the length of a VARCHAR primary Key

I have a table in InnoDB which uses a VARCHAR based ForeignKey: CREATE TABLE `portal_equity` ( `isin` varchar(12) NOT NULL,[详细]

2023-01-27 00:24 分类：问答
MYSQL: How to convert VARCHAR column containing dates to a DATE column?

I have a large table of birthdays that I want to convert from a varchar column to a date column. The table SQL is:[详细]

2023-01-26 09:48 分类：问答
Is there a legitimate reason for using so many varchar fields? (MS SQL DB)

I\'m working on data migration from an old IBM Universe-based system to a new enterprise-level data-information management system, and learning about database design in the process.[详细]

2023-01-18 22:56 分类：问答
Is it possible to globally configure all char/varchar/text columns in a mysql database to use utf8?

I have a database that I had imported and accidentally created some tables as using lat开发者_如何学Goin1 by default.I\'ve altered the tables and the database, but the columns are still latin1.I don\'[详细]

2023-01-18 12:18 分类：问答