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Hibernate: Automatically creating/updating the db tables based on entity classes
...>
<prop key="hibernate.dialect">org.hibernate.dialect.MySQL5Dialect</prop>
</props>
</property>
</bean>
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What Java ORM do you prefer, and why? [closed]
...ented data models. Instead, your company runs several instances of Oracle, MySQL, MSSQL, DB2 or any other RDBMS.
SQL has a structure and syntax. It should not be expressed using "low-level" String concatenation in JDBC - or "high-level" String concatenation in HQL - both of which are prone to hold s...
SQLAlchemy: print the actual query
...ho=True, to log all SQL queries. For example:
engine = create_engine(
"mysql://scott:tiger@hostname/dbname",
encoding="latin1",
echo=True,
)
This can also be modified for just a single request:
echo=False – if True, the Engine will log all statements as well as a repr() of their para...
Tab space instead of multiple non-breaking spaces (“nbsp”)?
... Was looking for this when building a large concat() query in MySQL for use in a Crystal Report. the ASCII (&#09;) did the job perfectly!
– MikeMighty
Mar 9 '18 at 14:40
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String.Join method that ignores empty strings?
...it's even simpler, since you can do it in SQL directly:
PostgreSQL & MySQL:
SELECT
concat_ws(' / '
, NULLIF(searchTerm1, '')
, NULLIF(searchTerm2, '')
, NULLIF(searchTerm3, '')
, NULLIF(searchTerm4, '')
) AS RPT_SearchTerms;
And even with the glori...
Why unsigned integer is not available in PostgreSQL?
... is the difference between tinyint, smallint, mediumint, bigint and int in MySQL? ) and realized that PostgreSQL does not support unsigned integer.
...
Select rows which are not present in other table
... records where join doesn't exist
Similar question on dba.SE targeted at MySQL:
Select rows where value of second column is not present in first column
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Advantages and disadvantages of GUID / UUID database keys
...of GUIDs as Primary Keys (SQL Server 2000)
Myths, GUID vs. Autoincrement (MySQL 5)
This is realy what you want.
UID Pros
Unique across every table, every database, every server
Allows easy merging of records from different databases
Allows easy distribution of databases across multiple servers
...
How to get a time zone from a location using latitude and longitude coordinates?
...her Ideas
Find the nearest city with an R-Tree
Find the nearest city with MySQL
Please update this list if you know of any others
Also, note that the nearest-city approach may not yield the "correct" result, just an approximation.
Conversion To Windows Zones
Most of the methods listed will return ...
Database Design for Revisions?
...le should contain all columns present in the first, Records table. E.g. in mysql you can easily create table with the same structure as another table (create table X like Y). And, when you are about to change structure of the Records table in your live database, you have to use alter table commands ...