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Error renaming a column in MySQL
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The standard Mysql rename statement is:
ALTER [ONLINE | OFFLINE] [IGNORE] TABLE tbl_name
CHANGE [COLUMN] old_col_name new_col_name column_definition
[FIRST|AFTER col_name]
for this example:
ALTER TABLE xyz CHANGE manufacurerid manufac...
Sequence contains no elements?
...stID == id
select p).Single();
Also; if this is LINQ-to-SQL, then in the current version you get a slightly better behaviour if you use the form:
var id = ID;
BlogPost post = dc.BlogPosts.Single(p => p.BlogPostID == id);
...
typecast string to integer - Postgres
...uery failed: ERROR: invalid input syntax for integer: ""
Problem
PostgreSQL has no pre-defined function for safely type casting any string into an integer.
Solution
Create a user-defined function inspired by PHP's intval() function.
CREATE FUNCTION intval(character varying) RETURNS integer AS ...
Unknown column in 'field list' error on MySQL Update query
I keep getting MySQL error #1054, when trying to perform this update query:
11 Answers
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What is the best extension for SQLite database files? [closed]
...specific naming convention, but what extension do you recommend when using SQLite?
5 Answers
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Manipulating an Access database from Java without ODBC
...ss databases without using ODBC. It uses two other packages, Jackcess and HSQLDB, to perform these tasks. The following is a brief overview of how to get it set up.
Option 1: Using Maven
If your project uses Maven you can simply include UCanAccess via the following coordinates:
groupId: net.s...
为维护国家安全 中国限制出口无人机和高性能计算机 - 资讯 - 清泛网 - 专注...
...超级计算机——神威蓝光，在国家超级计算济南中心投入使用。
【商务部海关总署公告2015年第31号关于加强部分两用物项出口管制的公告】
根据《中华人民共和国对外贸易法》和《中华人民共和国海关法》的相关规定，为维...
代码块超过1.2w编译apk报错问题 - App Inventor 2 中文网 - 清泛IT社区，为创新赋能！
...淆，或者规则放开（验证过，没用，还是一样报错）
不使用d8，用老版本的dex试试（不好恢复老版本不验证了）
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怀疑 kawa Scheme 生成问题，更新新版本试试。（也不容易更新）
https://community.appinventor.mi ... or-d8-failed/...
How to get Last record from Sqlite?
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This is very bad request for that purpose because sqlite should sort all records by their id (slow) before returning the result, Stephen Nguyen gave optimal request with DESC and LIMIT 1
– Artem Zinnatullin
Nov 15 '13 at 8:13
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What is a stack trace, and how can I use it to debug my application errors?
...ot insert: [com.example.myproject.MyEntity]
at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:96)
at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:66)
at org.hibernate.id.insert.AbstractSelectingDelegate.performInsert(AbstractSelec...