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How to insert new record in AdventureWorks2016 which uses BusinessIdentityId


By : Maria Marsala
Date : October 16 2020, 03:08 PM
I wish this help you In AdventureWorks2016 database there is a table with name Person.BusinessEntity, this table contains an identity column.
Reviewing Sales.Store table, there is a foreign key for Person.BusinessEntity table.
code :


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Should I insert and delete record OR insert and update record for LIKE/UNLIKE button? Which one is more cost effective?


By : Jai Kothawade
Date : March 29 2020, 07:55 AM
wish helps you Denormalize.
have a table with the likes and unlikes (Who did what to which item) have a likes and a unlikes field on the items table, both starting with 0
code :
INSERT INTO likes_unlikes SET item=[id of item], user=[id of user], action=[0|1];
UPDATE items SET likes=IF([action]=1,likes+1,likes), unlikes=IF([action]=0,unlikes+1,unlikes) WHERE id=[id of item]
INSERT INTO likes SET item=[id of item], user=[id of user];
UPDATE items SET likes=likes+1 WHERE id=[id of item]
DELETE FROM likes WHERE item=[id of item] AND user=[id of user];
UPDATE items SET likes=likes-1 WHERE id=[id of item]

Mysql Automatically insert specific record if doesn't exist or inserts new record if a specific record is update


By : Slava Scherbak
Date : March 29 2020, 07:55 AM
I wish did fix the issue. If you want to make sure that at least one administrator is always present, only delete the administrator if another one is still present:
code :
DELETE
  u1
FROM
  user u1
LEFT JOIN
  user u2
ON
  u1.access = u2.access
WHERE
  u1.name = "current-user" AND
  ((u1.name != u2.name AND u1.access = "admin") OR (u1.access != "admin"));

Why get null empty varchar record and 0 as date record when using Java insert value into mysql?


By : Sumit Jha
Date : March 29 2020, 07:55 AM
wish of those help I tried insert a roll using Java from eclipse to MySQL. I got not error notification. However, when I select record from table, I got empty records in varchar type column and 0000-00-00 in date type column. , Your Insert() method returns the literal string
code :
insert into employees(socialSecurityNumber, firstName, lastName, birthday, employeeType, departmentName)
values (+socialSecurityNumber, +firstName, +lastName, +birthday, +employeeType, +departmentName)
PreparedStatement ps = conn.prepareStatement("insert into employees(socialSecurityNumber, firstName, lastName, birthday, employeeType, departmentName) "
    + "values (?, ?, ?, ?, ?, ?)");
ps.setInt(1, socialSecurityNumber);
ps.setString(2, firstName);
...
ps.executeUpdate();

How to write an insert SQL statement that loop through each record in an array of objects and insert into a record's spe


By : user1469434
Date : March 29 2020, 07:55 AM
I hope this helps you . You can use jsonb_array_elements to extract each JSON from the array, then use that as the source for an INSERT:
code :
create table x(name text, gender text);

insert into x (name, gender)
select t ->> 'name', t ->> 'gender'
from jsonb_array_elements(
'[
  {
    "name": "abc",
    "gender": "male"
  },
  {
    "name": "bbc",
    "gender": "female"
  },
  {
    "name": "ccc",
    "gender": "male"
  }
]'::jsonb) t;
insert into x (name, gender)
select t -> 'name' ->> 'first', t ->> 'gender'
from jsonb_array_elements(
'[
  {
    "name": {"first": "a", "last": "b"},
    "gender": "male"
  }
]'::jsonb) t;

Insert parent child record using transaction [Executing successfully but record not inserted]


By : vincent
Date : March 29 2020, 07:55 AM
To fix the issue you can do I want to insert records into hierarchical tables using transaction. After executing its showing command completed successfully but records are not inserted into tables. Please see below script if missing something:
code :
SET IDENTITY_INSERT [dbo].[dev_emp_child] ON;
SET IDENTITY_INSERT [dbo].[dev_emp_master] ON;
 Print ERROR_MESSAGE() 
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