![]() ![]() If flags is specified, pgconvert() is applied to values with the. So, most of the time, the exception won't occur and you'll be done in one statement. plpgsql - How to insert (file) data into a PostgreSQL bytea column - Database Administrators Stack Exchange How to insert (file) data into a PostgreSQL bytea column Ask Question Asked 12 years, 4 months ago Modified 3 years, 7 months ago Viewed 202k times 55 This question is not about bytea v. pginsert() inserts the values of values into the table specified by tablename. Unless your business is growing at a rate that will make "where to put all the money" your only real problem, most of your inserts will be for existing customers. You will use the statement INSERT INTO table1 SELECT FROM table2 that takes the data from table2 and insert it into table1. Insert into "order" (customer_id, price) values \ PostgreSQL Insert Into Table Select From Another Table Consider a situation where you need to insert the data from one table to another table, What will you do. When that exception occurs, insert the customer into the customer table and redo the insert into the order table: insert into customer(name) values ('John') (providing you made customer_id non-nullable, which I'm sure you did). If the customer does not exist, you'll get an sql exception which text will be something like: null value in column "customer_id" violates not-null constraint ((select customer_id from customer where name = 'John'), 12.34) You can also insert more than one row in a. ![]() All you have to do is be an optimist and act as though the customer already exists: insert into "order" (customer_id, price) values \ The first thing to do before a database can be of much use is to insert data. The following SQL statement will insert one row of data into the cars table you created in the previous chapter. You can do it in one sql statement for existing customers, 3 statements for new ones. To insert data into a table in PostgreSQL, we use the INSERT INTO statement. ![]()
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