Summary of high-frequency SQL server problems

We are honored to be the moderator of the csdn technology community's SQL server problems and cutting-edge technologies. Repeated problems are often seen in the version, which is also a statistical analysis of high-frequency problems according to the requirements of other brothers.

Http://community.csdn.net/Expert/topic/5068/5068547.xml? Temp =. 3311731.

46.71% of the questions are about the basic use of statements and methods, which can be achieved through online database query help.
5.41% of the questions are about querying data groups, for example, the following example:
Col1 col2 col1 sum col1 connect col1 top1
----------- Get ----------- or ---------- or ---------
A 1 A 3 A 1 2 A 2
A 2
B 1 B 1 B 1 B 1 B 1

Merge or split basic data groups for ranking data

5.31% of the problem is about data import and export.
4.14% of the questions are about improving the query speed, reducing the number of database connections, creating indexes, and optimizing statements.
3.5% of the problems are the problems encountered during database installation.
3.5% of the problem is about triggers.
3.2% of the problem is about restoring the database.
2.44% of the problem is about connecting to a remote server.
1.91% of the problem is about database backup.
1.91% of problems are related to dates, such as sorting by dates.
1.49% of the questions are about database user roles and permissions.
In addition to the high-frequency problems mentioned above, they also include: database, data table design, cross tabulation, database packaging, database publishing, tree-type data processing, extended storage process usage, database replication, comparison of query statement efficiency, lock, job, paging, transaction, XML processing, row/column conversion, cursor, data encryption, system self-contained table usage, patch, query data sorting, memory usage, and view.

The above content is my own statistics on problems in the SQL Server difficult issue edition. Because the problem update speed is very fast, the statistical results may only reflect the situation at that time. Therefore, your summary of the problem will not simply stick to the content mentioned above.

Question collection: http://community.csdn.net/Expert/topic/5045/5045025.xml? Temp =. 3225519.

Database Query group type question: http://community.csdn.net/Expert/topic/5073/5073353.xml? Temp =. 9627649.

Data Import and Export problem summary: http://community.csdn.net/Expert/topic/5086/5086676.xml? Temp =. 3282282.

Summary of the problem of improving query speed: http://community.csdn.net/Expert/topic/5106/5106330.xml? Temp = 5.613345e-02

Remote SQL Server database connection Summary: http://community.csdn.net/Expert/topic/5106/5106345.xml? Temp =. 3122675.

SQL Server Installation problem summary: http://community.csdn.net/Expert/topic/5122/5122206.xml? Temp =. 5882532.

SQL Server restore problem summary: http://community.csdn.net/Expert/topic/5122/5122922.xml? Temp =. 2247736.

SQL Server backup problem summary: http://community.csdn.net/Expert/topic/5122/5122999.xml? Temp =. 1588404.

SQL Server trigger problem summary: http://community.csdn.net/Expert/topic/5146/5146269.xml? Temp =. 3856012.

Thank you.