alias

How to use aliases in query for making conditions in mysql

由 吃可爱长大的小学妹 提交于 2019-12-24 02:06:27
问题 I have user table like as follows user_id name gender age -------------------------------- 1 AAA Male 45 2 BBB Female 22 3 CCC Male 47 ................................. .............................. I want to get total no of users and total no of male users ans percent for male and female users select count(*) as total , SUM(IF(v.gender = 'Male',1,0)) as totalMale , SUM(IF(v.gender = 'Female',1,0)) as totalFemale , totalMale/total *100 , totalFeMale/total *100 from user; This query is not

Postgresql WHERE with age() function [duplicate]

由 本秂侑毒 提交于 2019-12-24 01:58:34
问题 This question already has answers here : Using an Alias column in the where clause in Postgresql (6 answers) Closed last year . I'm pretty sure this has been asked before but I am struggling to get the correct syntax for a table containing data like id date type report item_id 1 2018-11-07 Veröffentlichung des 9-Monats-Berichtes TRUE 16 2 2018-11-06 Veröffentlichung des 9-Monats-Berichtes TRUE 17 3 2019-03-07 Veröffentlichung des Jahresberichtes TRUE 17 4 2019-05-10 Bericht zum 1. Quartal

nginx配置文件root和alias区别

由 让人想犯罪 __ 提交于 2019-12-23 22:20:43
总结： alias指定的目录是准确的，root是指定目录的上级目录，并且该上级目录要含有location指定名称的同名目录 root的处理结果是：root路径＋location路径 + http后面的地址 alias的处理结果是：使用alias路径替换location路径 + http后面的地址 关于 / 的使用： alias虚拟目录配置中，location匹配的path目录如果后面不带"/"，那么访问的url地址中这个path目录后面加不加"/“不影响访问，访问时它会自动加上”/"； 但是如果location匹配的path目录后面加上"/"，那么访问的url地址中这个path目录必须要加上"/"，访问时它不会自动加上"/"。如果不加上"/"，访问就会失败！ root目录配置中，location匹配的path目录后面带不带 “/”，都不会影响访问 为了避免不必要的困扰可以都以 “/” 结尾 示例： 我在linux 服务器上有一个 html， 路径如下 /app/test/index.html 我想通过 http://ip/test/index.html 来进行访问： 可以在Nginx 的conf 中 nginx.conf 中加入配置： location /test/ { root /app/; } 或者 location /test/ { alias /app/test/; }

Use Column Alias In Select Statement Calculation Oracle SQL

由 白昼怎懂夜的黑 提交于 2019-12-23 18:37:43
问题 Is it possible to do something like select 1 as foo, foo+1 from dual This returns ERROR at line 1: ORA-00904: "FOO": invalid identifier I have a lengthy calculation that composes a column and I would like to be able to easily use that value for calculation in a difference column 回答1: You can't use an alias directly. One way is to use a derived table: SELECT foo, foo+1 FROM (SELECT 1 AS foo FROM dual) AS T 来源： https://stackoverflow.com/questions/11315870/use-column-alias-in-select-statement

MYSQL- Grab the last 5 rows AFTER sorting them by date

由 怎甘沉沦 提交于 2019-12-23 17:53:22
问题 I'm trying to execute a MYSQL command which grabs all the rows with the given UserID, sorts them by date, then returns only the first 5. The command to sort is ORDER BY date and the command to get the last 5 is WHERE ROWNUM <= 5 The WHERE comes before the ORDER, so it's backwards. So I figured I have to have a Mysql statement within a mysql statement. Here is my attempt. I was getting an alias error, so i added the AS T1 to the command. SELECT * FROM (SELECT voting_id, caption_uid, voting

Using alias name in another column

由 懵懂的女人 提交于 2019-12-23 17:42:37
问题 This question is extended part of my previous question, Finding number position in string. I have table myTable as below (myWord ==> varchar(10)) ++++++++++++ + myWord + ++++++++++++ + AB123 + + A413 + + X5231 + + ABE921 + + 15231 + + 523 + + ABC + ++++++++++++ What I wanted is as below. ++++++++++++++++++++++++++++++++ + myWord + myPos + NewString + ++++++++++++++++++++++++++++++++ + AB123 + 3 + AB + + A413 + 2 + A + + X5231 + 2 + X + + ABE921 + 4 + ABE + + 15231 + 1 + + + 523 + 1 + + + ABC

Is list[i] an alias for list.get_item(i) in C#?

由 久未见 提交于 2019-12-23 16:22:04
问题 I'm passing a lambda expression as a parameter. In this case, someObject has a property called property accessible with someObject.property . When I pass: o => o.childListOfObjects[0].property , where childListOfObjects is a List<someObejct> and , expression.Body returns o => o.childListOfObjects.get_Item(0).property . Skip to the end: Is list[i] an alias for list.get_item(i) in C#? 回答1: Yes, properties in general are just syntactic sugar around get_PropertyName and set_PropertyName methods.

Double Quotes in Oracle Column Aliases

由 依然范特西╮ 提交于 2019-12-23 10:39:34
问题 Ok, this is bit of an obscure question, but hopefully someone can help me out with it. The system I'm working on builds a dynamic SQL string for execution inside a stored procedure, and part of that dynamic SQL defining column aliases, which themselves are actually values retrieved from another table of user generated data. So, for example, the string might look something like; SELECT table1.Col1 AS "This is an alias" FROM table1 This works fine. However, the value that is used for the alias

Double Quotes in Oracle Column Aliases

由 天大地大妈咪最大 提交于 2019-12-23 10:39:27
问题 Ok, this is bit of an obscure question, but hopefully someone can help me out with it. The system I'm working on builds a dynamic SQL string for execution inside a stored procedure, and part of that dynamic SQL defining column aliases, which themselves are actually values retrieved from another table of user generated data. So, for example, the string might look something like; SELECT table1.Col1 AS "This is an alias" FROM table1 This works fine. However, the value that is used for the alias

Double Quotes in Oracle Column Aliases

由 落爺英雄遲暮 提交于 2019-12-23 10:38:18
问题 Ok, this is bit of an obscure question, but hopefully someone can help me out with it. The system I'm working on builds a dynamic SQL string for execution inside a stored procedure, and part of that dynamic SQL defining column aliases, which themselves are actually values retrieved from another table of user generated data. So, for example, the string might look something like; SELECT table1.Col1 AS "This is an alias" FROM table1 This works fine. However, the value that is used for the alias
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