SQL PROGRAMMING STYLE- P21 docx

SQL PROGRAMMING STYLE- P21 docx

... score means and why it is incremented. In Standard SQL, a comment begins with two dashes ( ) and ends with a new line, because the first SQL engines were on IBM mainframes and used punchcards. ... brackets. They are a better choice. SQL programmers do not like to put comments in their code, not even redundant or useless ones. My guess is that because SQL does a lot of work in one...

Ngày tải lên: 06/07/2014, 23:20

SQL PROGRAMMING STYLE- P19 docx

... predicates or CASE expressions. As an example of a horrible misuse of SQL, Chris White posted a procedure that built dynamic SQL that would then build a report. Aside from the obvious violations ... what you actually want. The other set operations in SQL- 92, EXCEPT [ALL], and INTERSECT [ALL] are not widely available yet. 6.11 Testing SQL When you are first writing a schema, you wi...

Ngày tải lên: 06/07/2014, 23:20