If Avalue equals to Bvalue then Bstatement is executed. Here c_name is the column name storing the status of the record, checked or not.ĭownload the SQL dump of the above student table Example By using SQL CASE we can get records based on Financial Year wise. Here Avalue is matched with different values given under WHEN. SELECT CASE WHEN c_name IS NOT NULL THEN 'checked' If any column has NULL data and we want to return 'checked' when it is not null and return 'not_checked' when it is NULL. Sum(CASE WHEN gender ='Female' THEN 1 ELSE 0 END) as Female To make this search case-sensitive, make sure that one of the operands has a case-sensitive or. This means that if you search with colname LIKE 'a', you get all column values that start with A or a. Sum(CASE WHEN gender ='male' THEN 1 ELSE 0 END) as Male, If entries of one table do not have any matching entries with another table, then you will get null values. The default character set and collation are utf8mb4 and utf8mb40900aici, so nonbinary string comparisons are case-insensitive by default. when a timezone from the JVM does not exist on the MySQL server: com.mysql. We can further break the gender column to get number of male and female in each class by using SQL GROUP BY. In these cases, use the nfig-file catalog. While grouping in a rang it is better to use MySQL BETWEEN Query SELECT `id`, `name`, `class`, `mark`, `gender` , Here student grade is awarded based on the mark they got. Here we check the condition and if it is True then the respective statement is executed. In this case we don't specify any value or data to be matched, instead we work on testing some conditions and if it is True then respective statement is to be executed. We can display based on the floor wise or location wise by using order by query SELECT `id`, `name`, `class`, `mark`, `gender` ,įROM `student` ORDER BY location Second Type (Matching condition with CASE statement) ![]() There are more records, here it is limited to 10 only. UPDATE firsttable, secondtable SET lumn1 lumn2 WHERE firsttable.id secondtable.tableid Here’s an SQL query to update firstname column in employees table to firstname. SELECT `id`, `name`, `class`, `mark`, `gender` , In such a case, you can use the following UPDATE statement syntax to update column from one table, based on value of another table. Using CASE in our query statement is here. Our list should display student details with class and location of the class. We have allotted rooms for the classes at different floors in a school. We will use our student table for this example. If any WHEN statement is matched then rest WHEN statements are not checked and matched statement is returned. If nothing is matched then statement under X_statement is executed. ![]() If it is not matched than next WHEN value C_value is checked. If A_value equals to B_value then B_statement is executed. Here A_value is matched with different values given under WHEN.
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