This method will help to avoid the risk of making any changes to the original one like processing the queries or dropping it by mistake when we give the same names to both the tables.įor example, if we apply this query to the above create a temporary table then, we get the result as:Įxplanation: If supposing whenever you want to delete the original table using the SQL drop temporary statement then, you will receive an error or warning which says that the table is unknown to be removed. Hence, it is a good practice to add a Temporary keyword while creating a short term table. We need to use the succeeding DROP TABLE SQL statement to delete a Temporary table not a permanent one from the database: This structure is similar as we perform normally to insert rows into the permanent table in MySQL.
INSERT INTO Credit(CustomerID,Credit_Limit) VALUES ('107', '3500') We will use the below query statement in MySQL for entering the values: Here, let us input some rows in the same table to show the records and insertion process.
#Mysql insert sql how to
How to insert data in MySQL Temporary Table?ĪS per the above queries, we have created a temporary table named Credit with fields (CustomerID, Credit_Limit). SELECT CustomerID, CustomerName, Sales FROM TopCustomer ORDER BY Sales Now to view the data from the top customer temporary table, we can fetch with the same query as we use for the permanent one. N.CustomerID = i.CustomerID GROUP BY i.CustomerID ORDER BY Sales DESC LIMIT 3 SELECT i.CustomerID, n.CustomerName, ROUND (SUM(i.PAmount),2)SalesįROM Payments17 i INNER JOIN Customers17 n ON INSERT INTO Payment(CustomerID, CustomerName, PAmount) VALUESĮxample #3 – Structure of the temporary table which is derived from a SELECT SQL statement
Inserting some records into the above table created for the further process with the query below: But firstly, let us create another table Payment with the following MySQL statement:ĬREATE TABLE Payment(CustomerID INT NOT NULL, CustomerName VARCHAR (255),PAmount INT, PRIMARY KEY(CustomerID)) We will here produce a temporary table that holds data of the top 3 customers by income. SELECT CustomerID, Credit_Limit FROM Customer WHERE Credit_Limit >0 Įxample #2 – To create a temporary table on the basis of a query example INSERT INTO Credit(CustomerID, Credit_Limit) Now we will insert a few records from the original Customer table to the temporary Credit table. Let us first create a new temporary table with the name customer having credits using the following SQL statement:ĬREATE TEMPORARY TABLE Credit(CustomerIDINT PRIMARY KEY, Credit_Limit DEC(10,2)) INSERT INTO Customer(CustomerID, CustomerName, Credit_Limit, City) VALUES ('101','Nikhil','2800','Delhi'),Įxample #1 – To create a simple Temporary table Also, firstly let us create a permanent table Customer which will work as a sample database table for the examples below using the following SQL statement:ĬREATE TABLE Customer(CustomerID INT NOT NULL, CustomerName VARCHAR(255), Credit_Limit DEC(10,2), City VARCHAR (255), PRIMARY KEY (CustomerID)) Īnd inserting few values for data into the Customer table by the below query: We will learn some steps to create the MySQL Temporary Table. But you can avoid this crucial situation by simply using the DROP TEMPORARY Table query statement to remove the provisional table. Then, you may need to query a DROP table statement to delete the table which will remove the original table in place of the temporary one that will make an exceptional case. Now in this condition of the session you cannot distinguish between the temporary table and real table. Generally, it is not recommended to use the same name for both the temporary and permanent tables because it may produce any misunderstanding and possibly may lead to any data loss from the database table unknowingly or as of sudden.įurther for example, during the session time in case your connection to the MySQL server fails, then suppose after a while you again get connected to the server. But when you delete the temporary table then, the permanent table now becomes available to access and manage things. If you perform any query for the table, it will now apply to the temporary table.
We can issue a Temporary table name similar to that of a normal table but then after it is generated the existing main table will be inaccessible. MySQL Temporary Table is characterized by the special features below: SELECT * FROM Original_TableLIMIT 0 How Temporary Table works in MySQL? For this, let us introduce a different syntax for the temporary table:ĬREATE TEMPORARY TABLE Temporary_TableName The MySQL statement syntax for Temporary table is:ĬREATE TEMPORARY TABLE TableA(Col1_Definition, Col2_Definition, ……, TableConstaints) īut to create a table which has an identical structure as per the existing table then, we cannot apply this CREATE TEMPORARY TABLE… LIKE query statement. Hadoop, Data Science, Statistics & others
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