Return records WHERE selected table column data is not found in another table column


HOME ยป Databases


I am having trouble figuring out the WHERE syntax for a query where I want to return only the records where the data in column "user_ID" from table user_name is not found in the column "user_ID" from table user_password.
So...

Code:

SELECT user_login_password.user_ID, user_name.user_ID
FROM user_name, user_login_password

How do I set up my WHERE statement so that if the same data is in both "user_name.user_ID" and "user_login_password.use

Related to : Return records WHERE selected table column data is not found in another table column
Is there a way to not return the `by` column as the first column in a data.table grouping
Databases

If I group-by using the by keyword in data.table it always returns the by column as the first column. Is there a flag/option to tell it not to do this? Or a clever way of getting rid of it?


In particular I want to group and then rbindlist to my original table, so infact the issue could also be said as - "how to stop it reordering the columns"


For example:


DT = data.table(I = as.numeric(1:6), N = rnorm(6), L = rep(c("a", "b", "c"), 2))
DT[, list(I = mean(I), N = mean(N)), by= L]
DT

gives:


> DT[, list(I = mean(I), N = mea
mysql query to return table.column where the column is the foreign key of another table
Databases

I am looking for a MySQL query that will return the table name and column name of any column that is the foreign key of a specified table.column. If you consider the tables below:


############### ###################
# Table A # # Table B #
############### ###################
# id # str # # id # tbl_A_id #
############### ###################
# 1 # str1 # # 1 # 1 #
############### ###################

Where B.tbl_A_id is a foreign key referencing A.id.


I realize the following query will in no way actually work, but it is the b

copy data from column 1 in table 1 to column 2 in table 2 and ignoring duplicates
Databases

I have a table 1 in wordpress as


wp_term_relationships (
object_id bigint(20),
term_taxonomy_id bigint(20),
term_order int(11)
)

and table 2 as


wp_test (
object_id bigint(20),
term_taxonomy_id bigint(20)
)

Now I am trying to update wp_term_relationships with the values in wp_test as


update ignore wp_term_relationships m1
inner join wp_test m2
on (m1.term_taxonomy_id = m2.term_taxonomy_id)
set m1.object_id = m2.object_id

However,

data updation of a column in sql table based on another column of same table
Databases

i have 2 table with four & five column in sql
in 1st table four column like ID - Parant - Position - Assign Id (ID+Position)


in 2nd table five column like assign ID - ID - L1- L2- L3


assign id & ID automatic update from 1st table
L1,L2,L3 based on assign id & ID column


i want a query for L1 column for update data like this procedure


find (ID+Left) in assign Id column and if match with records then copy record from ID column whose matched in assign Id and paste in L1 column


plz help me


Return records WHERE selected table column data is not found in another table column
Databases

I am having trouble figuring out the WHERE syntax for a query where I want to return only the records where the data in column "user_ID" from table user_name is not found in the column "user_ID" from table user_password.
So...

Code:

SELECT user_login_password.user_ID, user_name.user_ID
FROM user_name, user_login_password

How do I set up my WHERE statement so that if the same data is in both "user_name.user_ID" and "user_login_password.use
sql script to export table's column data to another table's column
Databases
Let's say , I have two table with same schema but different data .Table_A and Table_B . Table_A--------ID(p_key) Number(p_key) Column3 Column4-----------------------------------------------------ID1 1 AAA BBBID1 2 CCC DDDID2 1 EEE FFFID2 2 GGG HHH-Table_B--------ID(p_key) Number(p_key) Column3

Privacy Policy - Copyrights Notice - Feedback - Report Violation - RSS 2017 © bighow.org All Rights Reserved .