网站首页  手机软件  手机游戏  翻译软件  电影下载  电视剧下载  资讯攻略

请输入您要查询的游戏软件:

 

游戏 SQL Avanzado
分类 跑酷竞速
语言
大小
版本
下载
介绍
Course of advanced SQL, explained step by step, in 40 lessons:

A. - SQL TOP: TOP is used to specify the number of rows to display in the result.


2. - SQL Lite: LIKE is used in the WHERE clause to search for a pattern.


3. - SQL Wildcards: Wildcards (wildcards) are special characters that are used to perform special searches.


4. - SQL IN: IN to select multiple values ??in a WHERE clause.


5. - SQL BETWEEN: BETWEEN is used in the WHERE clause to select values ??from a range of data.


6. - SQL ALIAS is used to rename a table or column.


7. - SQL JOINS: JOINs can query data from 2 or more tables.


8. - SQL INNER JOIN: INNER JOIN is used to combine each row in a table with each row in another table.


9. - SQL LEFT JOIN: LEFT JOIN is used to combine the values ??of the first table with the values ??of the second table.


10. - SQL RIGHT JOIN: RIGHT JOIN is used to combine the values ??of the first table with the values ??of the second table.


11. - SQL FULL JOIN: FULL JOIN is used to combine the values ??of the first table with the values ??of the second table.


12. - SQL UNION: UNION is used to accumulate the results of two SELECT statements.


13. - SQL UNION ALL: SQL UNION ALL is used to accumulate the results of two SELECT statements.


14. - SQL SELECT INTO: SELECT INTO is used to copy data from one table to another table.


15. - SQL CREATE DATABASE: CREATE DATABASE is used to create databases.


16. - SQL RESTRICTIONS: Restrictions are used to limit the data type of a column.


17. - SQL NOT NULL: NOT NULL is used to specify that a column does not accept NULL.


18. - SQL UNIQUE: UNIQUE is used to uniquely identify each row in a table.


19. - UNIQUE SQL ALTER TABLE: ALTER TABLE to add UNIQUE UNIQUE to a column of a table, after being created.


20. - SQL PRIMARY KEY: PRIMARY KEY is used to uniquely identify each row in a table.


21. - SQL FOREIGN KEY: FOREIGN KEY is used to identify a column that is primary key in another table.


22. - SQL CHECK: CHECK to limit the range of values ??in a column.


23. - SQL DEFAULT: DEFAULT default value for a column


24. - SQL CREATE INDEX: CREATE INDEX to create an index on a table.


25. - SQL DROP: DROP serves to remove any item (index, table or database).


26. - SQL TRUNCATE: TRUNCATE is used to erase the data (not structure) of a table


27. - SQL ALTER: ALTER is used to modify the definition of a column in a table.


28. - SQL AUTO INCREMENT: AUTO INCREMENT generating auto-incrementing number for a column in a table.


29. - SQL VIEWS: VIEWS serves to create a virtual table (not an actual table) with the results of a query.


30. - SQL DATES: DATE defines different data types for dates and times.


31. - SQL NULL VALUES: NULL represents an undefined value.


32. - FUNCTIONS SQL NULL: NULL FUNCTIONS used to use NULL values.


33. - SQL DATA TEXT MySQL: MySQL TEXT DATA defines the different formats of text fields for MySQL.


34. - SQL NUMERIC MySQL: MySQL NUMERICAL DATA defines the different formats of numeric fields for MySQL.


35. - SQL DATA DATE MySQL: MySQL DATE DATA defines the different formats for date fields MySQL.


ADVANCED SQL is a manual very complete.
Try it! It's free!

截图
随便看

 

电脑知识库游戏下载栏目提供最新的最新手游、苹果手机游戏、安卓手机游戏等手机游戏下载,每日更新优秀的手机游戏app给大家。

 

Copyright © 2002-2024 pc699.com All Rights Reserved
更新时间:2026/1/11 6:15:08