大约有 40,000 项符合查询结果（耗时：0.0261秒） [XML]
Is there an SQLite equivalent to MySQL's DESCRIBE [table]?
...ed learning SQLite . It would be nice to be able to see the details for a table, like MySQL's DESCRIBE [table] . PRAGMA table_info [table] isn't good enough, as it only has basic information (for example, it doesn't show if a column is a field of some sort or not). Does SQLite have a way to do t...
How to prevent line-break in a column of a table cell (not a single cell)?
How can I prevent automatic line breaks in a column of table (not a single cell)?
9 Answers
...
Invalid default value for 'create_date' timestamp field
...QL'. There set 'SQL_MODE to be used in generated scripts' to "STRICT_TRANS_TABLES,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION" That solves the problem for good.
– sgtdck
Jan 28 '14 at 20:07
...
How can I list all collections in the MongoDB shell?
...e current database that I'm using?
Three methods
show collections
show tables
db.getCollectionNames()
To list all databases:
show dbs
To enter or use a given database:
use databasename
To list all collections:
show collections
Output:
collection1
collection2
system.indexes
(o...
How to recover MySQL database from .myd, .myi, .frm files
...
If these are MyISAM tables, then plopping the .FRM, .MYD, and .MYI files into a database directory (e.g., /var/lib/mysql/dbname) will make that table available. It doesn't have to be the same database as they came from, the same server, the same...
Saving timestamp in mysql table using php
I have a field in a MySQL table which has a timestamp data type. I am saving data into that table. But when I pass the timestamp ( 1299762201428 ) to the record, it automatically saves the value 0000-00-00 00:00:00 into that table.
...
Why is SELECT * considered harmful?
...work. This is especially true when someone adds new columns to underlying tables that didn't exist and weren't needed when the original consumers coded their data access.
Indexing issues. Consider a scenario where you want to tune a query to a high level of performance. If you were to use *, and ...
How do I check in JavaScript if a value exists at a certain array index?
...guage and it would be inefficient for certain code. They're probably hash tables or some hybrid mixture of strategies, and undefined ranges of the array probably aren't allocated their own memory. Nonetheless, JavaScript the language wants to present arrays of array.length n as having n members an...
Set NOW() as Default Value for datetime datatype?
I have two columns in table users namely registerDate and lastVisitDate which consist of datetime data type. I would like to do the following.
...
How to deal with SQL column names that look like SQL keywords?
...ause I didn't make it.
Am I allowed to do something like SELECT from FROM TableName or is there a special syntax to avoid the SQL Server being confused?
...