How to easily populate a table with random data. Have you ever wanted to quickly populate a test table with data? Well here is a single SQL statement that you can use as a basis to add in dummy data into any table with as many rows as you need. First let's pick a sample table to populate as follows: CREATE TABLE EMPLOYEE (EMP. So for example, if I want 1. I would use the following CTE: WITH EMP. Then union all's that with a new row which is the previous row value plus 1.

I have a SQL query where I am trying to update a column in a table from data in another table. This works fine when I try to update all the records in the first table. Senturus' comprehensive library of Cognos and Business Intelligence presentations and information. All of them are free and we add new resources regularly.

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The union all's continue until the EMP. First select the EMP. Let's assume that employees are at least 1. I'm using this to show you how you can create random dates within a given range).

The following starts with the current date and then subtracts from that a number ranging from 1. CURRENT DATE - ((1. RAND()*(4. 7*3. 65)) DAYS,Now we want a random salary. Let's assume that everyone makes more than $5. INTEGER(5. 00. 00 + RAND()*9.

Now for the most difficult part. We want to generate a random character string of up to 1.

For this we will first generate a random number that is up to 1. CHAR datatype) and then we will use the TRANSLATE function to randomly convert those numbers into characters. TRANSLATE ( CHAR(BIGINT(RAND() * 1. This will give you a random string made up of letters from a through j. If you want to get fancy you could put in fewer than 1. Or you could include upper case letters as well.

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Finally you have to put in the FROM clause in which you select from EMP. INSERT INTO EMP (EMP.