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POMysql: insert a new row in a child table with new values except for foreign key column which is obtained from parent table
 

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  1. POMysql: insert a new row in a child table with new values except for foreign key column which is obtained from parent table
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    <p>I'm having this situation. i want to insert a new row into a table which has a foreign key constraint to another table. when i insert a new row, i have new values obtained from user input except for the foreign key column which is to be obtained from the parent table. and the foreign key is an auto_increment primary key in the parent table. here is a the minimized schema to illustrate, only the relevant columns are shown.</p> <pre><code>CREATE TABLE CUSTOMER ( CUSTOMER_CODE INTEGER NOT NULL AUTO_INCREMENT, FIRST_NAME VARCHAR (20) NOT NULL, EMAIL VARCHAR (50) UNIQUE NOT NULL, . . . PRIMARY KEY (CUSTOMER_CODE) ); CREATE TABLE BOOKING ( BOOKING_CODE INTEGER NOT NULL AUTO_INCREMENT, CUSTOMER_CODE INTEGER NOT NULL, BOOKING_DATE DATE NOT NULL, . . . PRIMARY KEY (RESERVATION_CODE), CONSTRAINT BOOKING_CUSTOMER_FK FOREIGN KEY (CUSTOMER_CODE) REFERENCES CUSTOMER (CUSTOMER_CODE) ); </code></pre> <p>i want to know the insert statement that will feed into the BOOKING table a new row with values generated based on user interaction with the system for the rest of the columns (like <code>booking_date</code>) but obtain the <code>customer_code</code> from the customer table with a <code>where email=</code> clause with an email obtained from user input. </p>
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    1. USObby
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      1. POMysql: insert a new row in a child table with new values except for foreign key column which is obtained from parent table
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    1. COIn a broader context your application would have some login facility where you would have been asking him for login credentials. Just save those credentials in the session. After that you can query database for the id of the user having xyz unique email. Now you are having all the values. Go ahead with it. Insert the record.
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    2. CO@ankur.trapasiya that's what i'm asking for...the syntax of the insert statement
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    3. COinsert into booking values(....,12,....). 12 here is the customer id taken from the session.
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      1. POMysql: insert a new row in a child table with new values except for foreign key column which is obtained from parent table
      1. UStrapaank
 

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