join

问题 could you please help me out with this: I have a dataframe ( df1 ) that has index of all articles published in the website's CMS. There's a column for current URL and a column of original URLs in case they were changed after publication (column name Origin ): URL Origin ArticleID Author Category Cost https://example.com/article1 https://example.com/article 001 AuthorName Politics 120 USD https://example.com/article2 https://example.com/article2 002 AuthorName Finance 68 USD Next I have an

问题 I have a table TBL_POST used to store blog posts. A post can be assigned to multiple categories, there is a column, cat_id that stores category ID's in comma separated pattern like 2,4,6 . I want to use FIND_IN_SET() method in this line ->leftJoin(TBL_CAT.' as c', 'p.cat_id', '=', 'c.id') to show the associated category names. How can I do that? public static function getPostWithJoin($status="") { $query = DB::table(TBL_POST .' as p') ->select('p.id','p.post_title','p.post_status','u.name as

问题 I have a table TBL_POST used to store blog posts. A post can be assigned to multiple categories, there is a column, cat_id that stores category ID's in comma separated pattern like 2,4,6 . I want to use FIND_IN_SET() method in this line ->leftJoin(TBL_CAT.' as c', 'p.cat_id', '=', 'c.id') to show the associated category names. How can I do that? public static function getPostWithJoin($status="") { $query = DB::table(TBL_POST .' as p') ->select('p.id','p.post_title','p.post_status','u.name as

问题 I have 2 tables, say table A has 10 rows and table B has 100 rows and I want to perform a join, but the matching condition has to be where a column from A 'is like' a column from B meaning that anything can come before or after the column in B: For example: if the column in A is 'foo'. Then the join would match if column in B is either: 'fooblah', 'somethingfooblah', or just 'foo'. I know how to use the wildcards in a standard like statement, but am confused when doing a join. Does this make

问题 I have two tables agents and calls . An agent will always be on one active call. There can be another pending call assigned to an agent that an agent has not yet answered. I want to write a single query that tests to see if the latest call as sorted by dateCreated matches the call that is currently active in the agent`s table. Here is an example where the active call matches the agent's call: http://sqlfiddle.com/#!9/af5bd/5 Here is an example where the active call does not match the agent's

问题 I want to list the most recent activity (from FilteredActivityPointer) per account (FilteredAccount). Problem is that activities are not directly linked to account but have contacts in between. So accounts can have multiple contacts. Multiple contacts can have multiple activites. The full entity model Question: How can I retrieve the most recent activity per account? I tried the following (using SQL Server 2016, Transact SQL): SELECT * FROM FilteredContact co cross apply (SELECT TOP 1 * FROM

问题 I am working with inventory data that tells me the current inventory level every minute and stores it in the DB. I want to find each instance where item_count fell to 0, take that row with timestamp, and then join it to the next row where the item_count rose above 0. This will then tell me how long that product was out of stock. I came up with the following, but it doesn't return anything. SELECT `inventories`.* from `inventories` inner join (SELECT id, item_count, pusher_id, created_at as in

问题 This question already has answers here : MySQL how to fill missing dates in range? (5 answers) Closed 2 years ago . I have a table with information and dates, which have some missing ones, so I want to join that table with a calendar table to fill missing dates and set values in another column in the same row to null. This is an example: Steps | Date 10 | 2018-04-30 20 | 2018-04-28 And it want to do the following: Steps | Date 10 | 2018-04-30 null | 2018-04-29 20 | 2018-04-28 This is what I

问题 This question already has answers here : MySQL how to fill missing dates in range? (5 answers) Closed 2 years ago . I have a table with information and dates, which have some missing ones, so I want to join that table with a calendar table to fill missing dates and set values in another column in the same row to null. This is an example: Steps | Date 10 | 2018-04-30 20 | 2018-04-28 And it want to do the following: Steps | Date 10 | 2018-04-30 null | 2018-04-29 20 | 2018-04-28 This is what I

问题 I would like to combine different results from the same table as one big result. SELECT host_name,stats_avgcpu,stats_avgmem,stats_avgswap,stats_avgiowait FROM sar_stats,sar_hosts,sar_appgroups,sar_environments WHERE stats_host = host_id AND host_environment = env_id AND env_name = 'Staging 2' AND host_appgroup = group_id AND group_name = 'Pervasive' AND DATE(stats_report_time) = DATE_SUB(curdate(), INTERVAL 1 DAY) SELECT AVG(stats_avgcpu),AVG(stats_avgmem),AVG(stats_avgswap),AVG(stats