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ASP.NET custom error page - Server.GetLastError() is null
...ly reveal things you do not wish to do so to malicious users. For example Sql Server exception messages are very verbose and can give the user name, password and schema information of the database when an error occurs. That information should not be displayed to an end user.
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How to change the type of a field?
...ur database, this is a big deal no matter how you do it. If you were using SQL and this was a big table you would probably have to take some down time.
– Gates VP
Jun 28 '16 at 18:16
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Temporarily disable auto_now / auto_now_add
.../queries/… Be aware that the update() method is converted directly to an SQL statement. It is a bulk operation for direct updates. It doesn’t run any save() methods on your models, or emit the pre_save or post_save signals (which are a consequence of calling save()), or honor the auto_now field ...
Error Code: 1005. Can't create table '…' (errno: 150)
...ceeds the maximum length of 64 characters.
For more details, refer to: MySQL Error Number 1005 Can’t create table
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ALTER TABLE, set null in not null column, PostgreSQL 9.1
...OLUMN phone DROP NOT NULL;
More details in the manual: http://www.postgresql.org/docs/9.1/static/sql-altertable.html
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Difference between VARCHAR and TEXT in MySQL [duplicate]
When we create a table in MySQL with a VARCHAR column, we have to set the length for it. But for TEXT type we don't have to provide the length.
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What is a columnar database?
...o contrast it with row oriented database.
Row oriented databases (e.g. MS SQL Server and SQLite) are designed to efficiently return data for an entire row. It does it by storing all the columns values of a row together. Row-oriented databases are well-suited for OLTP systems (e.g., retail sales...
How to subtract X days from a date using Java calendar?
...er compliant with JDBC 4.2 or later. No need for strings, no need for java.sql.* classes.
Where to obtain the java.time classes?
Java SE 8, Java SE 9, Java SE 10, and later
Built-in.
Part of the standard Java API with a bundled implementation.
Java 9 adds some minor features and fixes.
Java ...
MySQL: Insert record if not exists in table
... if you need to get warning message you can afterwards do mysql> show warnings\G
– fiorentinoing
Oct 20 '16 at 18:59
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How to install Hibernate Tools in Eclipse?
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Step-by-step tutorial :
http://shivasoft.in/blog/sql/myqsl/step-by-step-hibernate-tutorial-using-eclipse-wtp/
Reverse Engineering Approach :
http://www.wikihow.com/Generate-Hibernate-Pojo-Classes-from-DB-Tables
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