SQL supports qualifying a column by prefixing the reference with either the full table name: …or a table alias: The table alias is the recommended approach — why type more than you have to? Why Do These Queries Look Different? Secondly, my answers use ANSI-92 JOIN syntax (yours is ANSI-89). While they perform the same, … Read more
Perhaps you should check NLS_DATE_FORMAT and use the date string conforming the format. Or you can use to_date function within the INSERT statement, like the following: Additionally, Oracle DATE stores date and time information together.
If you are a newbie, I think you should learn how to use git. You can refer the link below: https://education.github.com/git-cheat-sheet-education.pdf Basic steps: Clone or download source code from Github. You can download it directly, or use a tool like Git-bash, tortoise git… Run this source code, depending on the language of the source code.
Effectively, the IN statement creates a series of OR statements… so Is effectively And sadly, that is the route you’ll have to take with your LIKE statements
MYSQL_HOME variable value:C:\Program Files\MySQL\MySQL Server 5.0\bin %MYSQL_HOME%\bin See the problem? This resolves to a path of C:\Program Files\MySQL\MySQL Server 5.0\bin\bin
A query’s projection can only have one instance of a given name. As your WHERE clause shows, you have several tables with a column called ID. Because you are selecting * your projection will have several columns called ID. Or it would have were it not for the compiler hurling ORA-00918. The solution is quite simple: you … Read more
It’s true that if your primary key is just a identity value auto incremented, you would have no real use for ON UPDATE CASCADE. However, let’s say that your primary key is a 10 digit UPC bar code and because of expansion, you need to change it to a 13-digit UPC bar code. In that … Read more
TL;DR TEXT fixed max size of 65535 characters (you cannot limit the max size) takes 2 + c bytes of disk space, where c is the length of the stored string. cannot be (fully) part of an index. One would need to specify a prefix length. VARCHAR(M) variable max size of M characters M needs to be between 1 and 65535 takes … Read more
I have a table like: Not exactly like above but similar to that…. Now assume that my table has 200000 rows and now I want to remove partitions on the table and reorganize them in accordance to requirement without MAX VALUE in it. Can any one help me to rearrange partition without dropping data or … Read more
Try either multi-table update syntax Here is SQLFiddle demo or conditional update Here is SQLFiddle demo