inner-join

SQL query SELECT FROM [value from column of another table]

由 ☆樱花仙子☆ 提交于 2019-12-01 11:20:38
I have a table X where a trigger will insert a row when there's a changes to some tables. I've inserted the table name into table X. Now, I would like to select the data from table X while inner join with the actual table itself. Is it possible by using a value from a column of the select table as the table for inner join? The query should looks something like this SELECT X.a, Y.b, Y.c FROM X INNER JOIN [X.TableName] AS Y ON Y.ID = X.ID Executing select 'SELECT X.a, Y.b, Y.c FROM X INNER JOIN [' + X.TableName + '] AS Y ON X.ID = Y.ID where x.primarykey =' + x.primarykey from x Will output a

SQL query SELECT FROM [value from column of another table]

由 Deadly 提交于 2019-12-01 09:12:39
问题 I have a table X where a trigger will insert a row when there's a changes to some tables. I've inserted the table name into table X. Now, I would like to select the data from table X while inner join with the actual table itself. Is it possible by using a value from a column of the select table as the table for inner join? The query should looks something like this SELECT X.a, Y.b, Y.c FROM X INNER JOIN [X.TableName] AS Y ON Y.ID = X.ID 回答1: Executing select 'SELECT X.a, Y.b, Y.c FROM X INNER

FIRDatabaseQuery: how to do an inner join

由 浪尽此生 提交于 2019-12-01 09:10:15
I'm trying to do an inner join on a FIRDatabaseQuery object. below is the database structure. I have some posts that are linked to post-comments. I am trying to get all the posts that a specific user added a comment on: { "posts" : { "-KIycKhZU55dmKnHbbxv" : { "author" : "John Doe", "body" : "This is a post test", "title" : "test", "uid" : "SHaH36BLwgPvwgi9cDmRnsnONFB2" }, "-KIyg_ks1O5QL4_4dfq_" : { "author" : "Jane Doe", "body" : "This is a post test", "title" : "test2", "uid" : "x5leSBGArnd10JilD9YDyNBNfZ03" },... } "post-comments" : { "-KIycKhZU55dmKnHbbxv" : { "-KIycMyL0Vy1BHVdI4zc" : {

django inner join query

由 China☆狼群 提交于 2019-12-01 09:05:54
问题 I am working with django and having a hard time grasping how to do complex queries Here is my model class TankJournal(models.Model): user = models.ForeignKey(User) tank = models.ForeignKey(TankProfile) ts = models.DateTimeField(auto_now=True) title = models.CharField(max_length=50) body = models.TextField() class Meta: ordering = ('-ts',) get_latest_by = 'ts' I need to pull the username given the tank object. The user object is the one built into django.. thanks! EDIT: I have tried this print

Entity Framework Mapping to Lookup table

由 ☆樱花仙子☆ 提交于 2019-12-01 06:32:32
I have 3 tables that need to be mapped with Entity Framework and I'm not sure the proper way to go about this. Here are my 3 entities: public class User { [Key] public int user_id {get; set;} public string user_name {get; set;} public virtual List<Role> roles {get; set;} } public class Role { [Key] public int role_id {get; set;} public string role_name {get; set;} } public class User_Role { [Key] public int user_role_id {get; set;} public int user_id {get; set;} public int role_id {get; set;} } Please note that the User_Role entity just represents a lookup table to link many roles to a single

Postgres COUNT number of column values with INNER JOIN

由 ∥☆過路亽．° 提交于 2019-12-01 06:25:44
问题 I am creating a report in Postgres 9.3. This is my SQL Fiddle. Basically I have two tables, responses and questions , the structure is: responses ->id ->question_id ->response questions ->id ->question ->costperlead for the column response there can only be 3 values, Yes/No/Possbily , and my report should have the columns: question_id , # of Yes Responses , # of No Responses , # of Possbily Responses , Revenue Then: # of Yes Responses - count of all Yes values in the response column # of No

Yii2 innerJoin()

由 对着背影说爱祢 提交于 2019-12-01 06:05:42
I want to implement a sql query in the following way: INNER JOIN `Product_has_ProductFeature` t ON `Product`.`id` = t.`productId` AND t.`productFeatureValueId` = 1 INNER JOIN `Product_has_ProductFeature` t1 ON `Product`.`id` = t1.`productId` AND t1.`productFeatureValueId` = 5 How can I do this using innerJoin() or something like above mentioned? innerJoin() is a method from the Query class. You can try something like this. $query = new \yii\db\Query; $command = $query->innerJoin( 'Product_has_ProductFeature', `Product`.`id` = t.`productId`) ->andWhere('t.`productFeatureValueId` = 1') -

Entity Framework Mapping to Lookup table

由 ε祈祈猫儿з 提交于 2019-12-01 05:09:21
问题 I have 3 tables that need to be mapped with Entity Framework and I'm not sure the proper way to go about this. Here are my 3 entities: public class User { [Key] public int user_id {get; set;} public string user_name {get; set;} public virtual List<Role> roles {get; set;} } public class Role { [Key] public int role_id {get; set;} public string role_name {get; set;} } public class User_Role { [Key] public int user_role_id {get; set;} public int user_id {get; set;} public int role_id {get; set;}

mysql query join/inner join

由 喜夏-厌秋 提交于 2019-12-01 04:56:18
问题 i have two tables in my mysql i want to extract the results based on combined query for both tables. i tried join as well as inner join but no success the structure of tableA is id userid topic 1 34 love 3 64 friendship 35 574 romance 32 253 games 95 633 football 54 26 cricket 648 63 music tableB is id location username 34 Australia krkrff 64 india dieiei 574 pakistan frkfrf 253 japan frfffrk 633 india ifirf 26 Australia riiri 63 Australia frffjrr Please note that in tableA userid and in

Yii2 innerJoin()

由 房东的猫 提交于 2019-12-01 03:45:10
问题 I want to implement a sql query in the following way: INNER JOIN `Product_has_ProductFeature` t ON `Product`.`id` = t.`productId` AND t.`productFeatureValueId` = 1 INNER JOIN `Product_has_ProductFeature` t1 ON `Product`.`id` = t1.`productId` AND t1.`productFeatureValueId` = 5 How can I do this using innerJoin() or something like above mentioned? 回答1: innerJoin() is a method from the Query class. You can try something like this. $query = new \yii\db\Query; $command = $query->innerJoin(
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