If you’ve been developing in SQL Server for any length of time, you’ve no doubt hit this scenario: You have an existing, working query that produces results your customers or business owners say are correct.
Code Should be Rerunnable - So You Need to Check if Indexes Exist Whenever you set up a script to create or drop an index, you want a safety check in there. Drop the index if it exists. Create the index if it doesn’t. Or do something else programmatically. Checking if an index ex...
I hope you all know how to add new column to an existing table. However, let me go ahead and explain the steps and various approaches to check if the column already exists. For demo purposes, I have used the below Apps and created a new database called “Tutorial” MS SQL Management ...
In SQL, astatementis any operation sent to the database system that will perform some sort of task, like creating a table, inserting or deleting data, or changing the structure of a column or table. Aqueryis an SQL statement that retrieves information about data held in a database. On ...
Create Table Exercise You have just started a new company. It is time to hire some employees. You will need to create amyemployeestable that will contain the following information about your new employees:firstname,lastname,title,age, andsalary. Once it’s created successfully, go to the “...
query to find unique constraints on a table in oracle SQL> CREATE TABLE DEPT_MASTER ( dept_nr NUMBER UNIQUE, dept_name varchar2(100) NOT NULL, dept_status NUMBER(1,0) NOT NULL, created_at date ); Table created. SQL> select CONSTRAINT_NAME,INDEX_NAME,CONSTRAINT_TYPE from user_constraints...
Insert Data in Table The insert statement adds a new row or rows in a table in theOracle database. We generally use it after we have created a table in the database. One important point to remember is that while inserting records into a table, we must provide a value for every NOT ...
First, let’s copy the results from SQL Server Management Studio and paste them into Excel so that we can create the pivot table that we’re going to re-produce in SQL. PIVOT operator syntax The PIVOT operator has the following structure: ...
1. How to check the consistency the backup , why i am can not see my table ? 2. How to set NBU script when in one box solaris have 3 instance oracle ? for example each instance different oracle home and password and user the oracle owner ...
we are looking for the Year in D1 table when D2 is 2017. Now I just did this to trigger a 0 but you can adjust this for whatever condition you are looking for. The important bit is it returns 0 to PkgVariable when not found and 1 to PkgVariable when found. ...