what does leave do in mysql — MySQL — Leave statement is used to immediately exit the loop. [label]: LOOP … — terminate the loop IF condition THEN LEAVE [label]; END IF; … END LOOP;

uninstall mysql ubuntu 18.04 stackoverflow sudo service mysql stop #or mysqld sudo killall -9 mysql sudo killall -9 mysqld sudo apt-get remove –purge mysql-server mysql-client mysql-common sudo apt-get autoremove sudo apt-get autoclean sudo deluser -f mysql sudo rm -rf /var/lib/mysql sudo apt-get purge mysql-server-core-5.7 sudo apt-get purge mysql-client-core-5.7 sudo rm -rf /var/log/mysql sudo rm -rf […]

ubuntu restart mysql sudo service mysql restart restart sql server ubuntu service mysql restart restart mysql 1. sudo /etc/init.d/mysql restart 2. # service mysql restart restart mysql server ubuntu service mysqld restart

subqueries ALL sql SELECT ProductName FROM Products WHERE ProductID = ALL (SELECT ProductID FROM OrderDetails WHERE Quantity = 10);

sql string functions ASCII Returns the equivalent ASCII value for a specific character. CHAR_LENGTH Returns the character length of a string. CHARACTER_ LENGTH Same as CHAR_LENGTH. CONCAT Adds expressions together, with a minimum of 2. CONCAT_WS Adds expressions together, but with a separator between each value. FIELD Returns an index value relative to the position […]

sql server rtrim everything after character SELECT [FullName] ,LEFT([FullName], CHARINDEX(‘,’, [FullName]) – 1) AS [Surname] ,REPLACE(SUBSTRING([FullName], CHARINDEX(‘,’, [FullName]), LEN([FullName])), ‘,’, ”) AS [FirstName] FROM Employee

sql server find columns list in tables SELECT * FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME = N’DIM_VENDING_MATERIALS’

sql server drop constraint default value ALTER TABLE [TheTable] DROP CONSTRAINT [TheDefaultConstraint]