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How do I specify unique constraint for multiple columns in MySQL?
I have a table:
14 Answers
14
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Fixing “Lock wait timeout exceeded; try restarting transaction” for a 'stuck" Mysql table?
...threads concerning this problem: Sometimes the process that has locked the table shows up as sleeping in the processlist! I was tearing my hair out until I killed all the threads that were open in the database in question, sleeping or not. That finally unlocked the table and let the update query run...
Python's json module, converts int dictionary keys to strings
...e.
In Python (and apparently in Lua) the keys to a mapping (dictionary or table, respectively) are object references. In Python they must be immutable types, or they must be objects which implement a __hash__ method. (The Lua docs suggest that it automatically uses the object's ID as a hash/key ...
PostgreSQL “DESCRIBE TABLE”
How do you perform the equivalent of Oracle's DESCRIBE TABLE in PostgreSQL (using the psql command)?
22 Answers
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Adding parameter to ng-click function inside ng-repeat doesn't seem to work
...g custom html and compile it using angular in the controller.
var tableContent= '<div>Search: <input ng-model="searchText"></div>'
+'<div class="table-heading">'
+ '<div class="table-col">Customer ID&l...
Best way to synchronize local HTML5 DB (WebSQL Storage, SQLite) with a server (2 way sync) [closed]
...ize the lib (at each startup for example).
It will automatically create 2 tables (if they don't already exists, one to store all the new or modified elements (table new_elem) and one to store the date of the last sync (table sync_info). It will also create SQLite triggers in order to watch the INSE...
如何查看Oracle用户的SQL执行历史记录？ - 数据库(内核) - 清泛网 - 专注C/...
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SQL> select username,scn,timestamp,sql_redo from v$logmnr_contents where table_name='TEST2';
SQL> select username,scn,timestamp,sql_redo from v$logmnr_contents where username='P_CHENMING';
--关闭MINER
SQL> execute dbms_logmnr.end_logmnr;
--关闭辅助日志
SQL> alter database drop suppl...
How to remove a lua table entry by its key?
I have a lua table that I use as a hashmap, ie with string keys :
1 Answer
1
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Why is the tag deprecated in HTML?
...nvas. It is only deprecated because of the war against marquees, centers, tables, frame which is purely religious, as they all have a place.
– Dmitry
Jun 5 '16 at 18:23
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Populate data table from data reader
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You can load a DataTable directly from a data reader using the Load() method that accepts an IDataReader.
var dataReader = cmd.ExecuteReader();
var dataTable = new DataTable();
dataTable.Load(dataReader);
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