SQL Query to Replace a Column Values from ‘male’ to ‘female’ and ‘female’ to ‘male’
In this article, we will Implement a Query to Replace Column Values from ‘male’ to ‘female’ and ‘female’ to ‘male’. For a better explanation, we will Implement this Query with an Example. For Implementation of this Query first of all we will create a database. Name of Database “Sample”.
After that Inside the Database, We will Create a Table. The name of the table is “EMPDATA”. Here we will replace column values from ‘Male’ to ‘female’ and ‘female’ to ‘male’ with the help of UPDATE, CASE statement, and condition.
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Now, we have to follow the below statement for Implementing this Query.
Step 1: Create a database
For database creation, there is the query we will use in MS SQL Server.
CREATE DATABASE Sample;
Step 2: Use a database
for using the database
use database_name; for this database… use Sample;
Step 3: Create a table
For the creation data table, we will use this below query
CREATE TABLE EMPDATA ( EMPNAME VARCHAR(25), GENDER VARCHAR(6), DEPT VARCHAR(20), CONTACTNO BIGINT NOT NULL, CITY VARCHAR(15) );
Step 4: Structure of the table
In SQL with the Help of the EXEX sp_help table name, we can see the structure of the table. Like a number of columns, data type, size, nullability, and constraints. EXEC Sp_ help Query is similar to DESC or DESCRIBE Query.
EXEC sp_help EMPDATA
Step 5: Insert a value into a table
INSERT INTO EMPDATA VALUES ('VISHAL','MALE','SALES',9193458625,'GAZIABAD'), ('DIVYA','FEMALE','MANAGER',7352158944,'BARIELLY'), ('REKHA','FEMALE','IT',7830246946,'KOLKATA'), ('RAHUL','MALE','MARKETING',9635688441,'MEERUT'), ('SANJAY','MALE','SALES',9149335694,'MORADABAD'), ('ROHAN','MALE','MANAGER',7352158944,'BENGALURU'), ('RAJSHREE','FEMALE','SALES',9193458625,'VODODARA'), ('AMAN','MALE','IT',78359941265,'RAMPUR'), ('RAKESH','MALE','MARKETING',9645956441,'BOKARO'), ('MOHINI','FEMALE','SALES',9147844694,'Dehli') SELECT * FROM EMPDATA;
Step 6: Implementation of the query to replace column values from ‘Male’ to ‘Female’ and ‘Female’ to ‘Male’.
We can use an Update statement with WHERE Clause or Without WHERE CLAUSE.
- Update statement without where clause: The Update Statement Without the Where Clause is Used to Update all rows in a table.
UPDATE [EMPDATA] SET GENDER = ‘FEMALE’;
This Query will Update GENDER = ‘FEMALE’ for all rows.
- Update statement with where clause: The Update Statement with the Where clause is used to Update a single or multiple rows on the basis of the WHERE clause in SQL Server.
UPDATE [EMPDATA] SET GENDER = ‘FEMALE’ WHERE EMPNAME = ‘AMAN’
- For Multiple Column Updating:
UPDATE [EMPDATA] SET GENDER = ‘FEMALE’ WHERE EMPNAME = ‘AMAN’ or EMPNAME = ‘VIJAY’;
Now we will IMPLEMENTATION OF Query to Replace a Column Values from ‘male’ to ‘female’ and ‘female’ to ‘male’
UPDATE [EMPDATA] SET GENDER = (CASE WHEN GENDER ='MALE' THEN 'FEMALE' WHEN GENDER = 'FEMALE' THEN 'MALE' END )
Execute the following code and notice that we want to evaluate CASE Gender in this query.