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What are DDL and DML?
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More information see here: MySQL What is DDL, DML and DCL?, the original is as follows:
DDL
DDL is short name of Data Definition Language, which deals with
database schemas and descriptions, of how the data should reside in
the database.
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How can I generate an MD5 hash?
...en how do u convert this thedigest to a string so that we can insert it in mysql ?
– Humphrey
Nov 8 '17 at 8:39
3
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What is best tool to compare two SQL Server databases (schema and data)? [duplicate]
...ta Compare and Synchronise and much more. Also supports SQL Azure and some MySQL Support too.
[UPDATE: Yes I am the Author of the above program, as it's now Free I just wanted to Share it with the community]
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Can HTML be embedded inside PHP “if” statement?
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Some servers don't have libxml or pdo_mysql installed, but we can still recommend solutions using them.
– chaos
Apr 6 '09 at 18:25
2
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Why is “a” != “a” in C?
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'a' == 'A' // not true ... MySQL begs to differ.
– Steven
Jan 30 '11 at 21:09
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Alternate output format for psql
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If you looking for equivalent to \G from Mysql, try append \x\g\x to the end of query or define shortcut in ~/.psqlrc adding \set G '\\set QUIET 1\\x\\g\\x\\set QUIET 0', then use on the end :G. (note lack of semicolons)
– Sławomir Lenart
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php $_POST array empty upon form submission
...e a custom CMS i've built that works perfectly on my dev box (Ubuntu/PHP5+/MySQL5+).
27 Answers
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How to change column datatype in SQL database without losing data
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ALTER TABLE [Employee] ALTER COLUMN [Salary] NUMERIC(22,5)
if you use MySQL; you should try this script:
ALTER TABLE [Employee] MODIFY COLUMN [Salary] NUMERIC(22,5)
if you use Oracle; you should try this script:
ALTER TABLE [Employee] MODIFY [Salary] NUMERIC(22,5)
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How Do I Get the Query Builder to Output Its Raw SQL Query as a String?
...eir values. To get the queries in their entirety you need to log them from MySQL. There's more info here: stackoverflow.com/questions/1786322/…
– Matthew
Aug 31 '14 at 20:20
41
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What is an ORM, how does it work, and how should I use one? [closed]
...most popular is relational ( you know tables, columns, pk fk etc eg Oracle MySQL, MS-SQL )
And finally the Mapping part is where you do a bridge between your objects and your tables.
In applications where you don't use a ORM framework you do this by hand. Using an ORM framework would allow you d...