1/9/2023 0 Comments Postgresql serialIllustrate the content of the Grades table with the help of the following snapshot and SQL statement.Ħ. Now, the Grades table will have mixed numerical and character types of rating stored. Now, suppose the requirement is changed where we have to store the grades in numerical format instead of character, so using the following statement, we can insert numerical values in the Grades table.ĥ. Illustrate the Grades table’s content with the help of the following snapshot and SQL statement.Ĥ. Now, insert some data into the ‘Grades’ table using INSERT statement as follows:ģ. Now, let’s create a new table of name ‘Grades’, which will have a column named’Grade’ using CREATE TABLE statement as follows:Ģ. Use the following statement to do the conversion:ġ. Convert a STRING constant to timestamp type using the following statement Output: Illustrate the following snapshots to understand the result of the above statement:ġ. In order to execute the above statement correctly we have to use the following syntax where instead of DOUBLE, we have to use DOUBLE PRECISION,Ĭonvert a STRING constant to Boolean type using the following statement, where the ‘FALSE’, ‘false’, ‘f’ and ‘F’ gets converted to false, and ‘TRUE’, ‘true’, ‘t’ and ‘T’ gets converted to true as follows: Output: After executing the above SQL statement, PostgreSQL will give us the following error: the value contains precision.Ģ. Now, try to convert a STRING constant to a DOUBLE type using the following statement: Output: After executing the above SQL statement, PostgreSQL will give us the following error: the value contains a character.Ĭonvert a STRING constant to DATE type using the following statement:ġ. The PostgreSQL CAST operator raises an error if the given value is not convertible to the target data type. Output: Illustrate the following snapshot to understand the result of the above statement:Ģ. Use the following statement to do the conversion: Now, Let’s have a look at the following examples, which converts one data type to another data type.
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