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Is it correct to use DIV inside FORM?
...l. You can try it yourself at a HTML validator. Besides, it is almost inevitable these days, since the modern pages are build on div's. If it was not allowed, a simple wrapper or placing the form in a container would already make the page invalid.
– Nrzonline
S...
What is SQL injection? [duplicate]
...rameter substitutes only for a single value. You can't use parameters for table or column identifiers, or SQL keywords, or lists of values in an IN() predicate, or other SQL expressions or syntax. Parameters are useful but you need other techniques for other cases.
– Bill Kar...
How can I convert bigint (UNIX timestamp) to datetime in SQL Server?
...ved simply as: select dbo.fn_ConvertToDateTime( src_column/1000 ) from src_table;
– access_granted
Jan 10 '19 at 4:42
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UITableViewCell with UITextView height in iOS 7?
How can I calculate the height of an UITableViewCell with an UITextView in it in iOS 7?
12 Answers
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Set value to NULL in MySQL
...t NULL inside quotes in your update statement. This should work:
UPDATE table SET field = NULL WHERE something = something
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常用Sql - 爬虫/数据库 - 清泛IT社区，为创新赋能！
本帖最后由 zqp2013 于 2015-3-17 22:06 编辑
mysql：drop table if exists tablename;
不能写成
drop table tablename if exists tablename;
mysql：建立索引Sql
CREATE TABLE tablename (
`ID` &nbs...
Syntax of for-loop in SQL Server
...teger in their work (iterating from row to row or result to result in temp tables) and may be thrown off if the increment happens at the beginning of the cycle rather than the end.
– CSS
Feb 3 '16 at 15:22
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What happens when a computer program runs?
...me systems)
+---------+
| text | program code, this is the actual executable code that is running.
+---------+
This is the general process address space on many common virtual-memory systems. The "hole" is the size of your total memory, minus the space taken up by all the other areas; this gi...
How do I copy SQL Azure database to my local development server?
...Using SSIS (SQL Server Integration Services). It only imports data in your table. Column properties, constraints, keys, indices, stored procedures, triggers, security settings, users, logons, etc. are not transferred. However it is very simple process and can be done simply by going through wizard i...
How to delete all data from solr and hbase
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This answer discusses how to delete all the tables in hbase: stackoverflow.com/questions/3990952/…. If you want to just delete the data in the table, you can truncate them rather than drop them.
– codingFoo
Nov 30 '11 at 23:13...