It’s important to choose the right datatypes when designing a database. Greg Larsen explains the differences between CHAR, VARCHAR and VARCHAR(MAX).
name VARCHAR(50), code CHAR(10) ); Contributor Author kartik1112 commented Jul 28, 2024 @happysangwan can you mention the issue here? 1ilit added a commit that referenced this issue Jul 28, 2024 Merge pull request #171 from kartik1112/main … 61f5cd0 1ilit closed this as complete...
Adding varchar(8) in time format that totals more than 24 hrs in SQL Additional Column With BULK INSERT Adventureworks query about sales AFTER INSERT and AFTER UPDATE triggers on same table After INSERT Trigger question - how to use value from last added record Age Bucket in sql Age calculat...
'string.Split(params char[])' has some invalid arguments 'string' does not contain a definition for 'empty' 'System.Threading.ThreadAbortException' occurred in mscorlib.dll...what is the error?how to solve??? 'System.Web.UI.WebControls.Literal' does not allow child controls. 'The input is...
I recently had a coworker ask me about a strange situation: They were trying to modify a column on a table to go from a CHAR(4 BYTE) to a VARCHAR2(5 BYTE). Oracle, however, didn’t seem to want to cooperate. Oracle returned an ORA-01439: column to be modified must be empty to...
Implementing DB-API Cursor.setinputsizes() would be my recommendation too --- perhaps with an extension to allow specifying exact SQL types, so that cases such as varchar vs. char can be distinguished, scale and precision specified for decimal types, etc. I can try to work on this. Contri...
使用SQL Server Management Studio 从使用非 Unicode 数据类型的 SQL Server 数据库中查询字符数据。 例如,SQL Server 数据库使用char或varchartext数据类型。 客户端计算机的代码页不同于数据库的代码页。 代码页与数...
oracle varchar转化为char,case when里面经常出现 select * from ( select ta.*,(case when (ta.task_type='1' or ta.task_type='2') then (select to_char(b.name) from act_basicinfo b where 1=1 and b.events_uid=ta.rel_uid ) else (select (case when y.HANDLE_APPLYTYPE=0 then '固定...
allow errors to do what they are supposed to do: end the procedure and show a message to the...
To address the off-topic 😉 The hope that COUNT(col1) is faster than COUNT(*) is false indeed. Take a look at this: create table test( pk char(100) not null, col1 tinyint not null, primary key(pk), key(col1) ) engine = innodb; Now what do you think MySQL will do with ...