146 questions
Suppose you have a table with about 30 columns, and you have a huge number of records every day.We initially fix 30 columns, but we may increase them to 35.AAA,BBB,FFFAAA, CCC, DDDBBB, CCC, EEE If you...
As stated in the title, I would like to connect to DB2(v9.5) from PHP 5.6, but an error occurred and I cannot connect.Error Contents [IBM] [CLI Driver] SQL0332N Character conversion from the source co...
// Obtain registry data from OLE DBconn.ConnectionString=string.Format(Provider=Microsoft.ACE.OLEDB.12.0; Data Source={0}; Extended Properties=Paradox 5.x;, inputFolderName);conn.Open();This operation...
For example, a user table with user informationuser_0, user_1, user_2, user_3 (when userId is divided by 4, the remainder follows the table name) I would like to know how to implement without having t...
The server-side language is PHP 7.0.In general, I couldn't imagine what kind of solution I should take when I accomplished the subject matter, and I asked an unreasonable question.However, after recei...
DDD recognizes transaction management at the application layer.For example, there are two domain models: User and Company.Let's say that each of them has a DB registration process on the master screen...
I have a question about how to use DB for Android app development.実現What I want to realizeInstead of creating a DB in the app, you can import an existing DB into the app and use it.疑問Question1, When I...
The MySQL reference documentation provides these descriptions and examples of the gap lock [1].A statement that locks a row by using a unique index to search for a unique row does not require a gap lo...
SELECT syainNo , name ,date ,place , time FROM YOTEI_DATA_TBL;I selected what I created in oracle db. ORA-00936—The expression is missing.00936.00000 - missing expression*Cause: *Action:Row 16 Co...
We create applications that mimic EC sites.I would like to normalize the product table.Currently, the table configuration is as follows.1 id2. Product name3. List Price4. Number of stocks5 Date of arr...
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