Learn about the key differences between CHAR and NCHAR data types in MySQL, including storage requirements and usage scenarios.
Except the above statement, there is no difference between AND and &&. Let us look at all the conditions. The result of AND and && will always be either 1 or 0. As we know the AND and && both are logical operators, if there are more than one operand and any one of them has valu...
Varchar and enum approaches look pretty much the same for a human eye. On the other hand, the integer is not human-readable. Then you see status=1, you have no way to say what status is just by looking into the database, and you have to keep the mapping between numbers and words ...
• 身份号:char(18) • 电话:char(11) • 地址:varchar(255) • 备注:text • 姓:varchar(10) • 名:varchar(10) • 编号:主键 • 姓名:普通索引(注意在区别分度高的字段上加) • 身份证:unique • 电话:unique • 备注:全文索引,借助第三方软件sphinx来运行 • 姓和名:联合索引,...
Re: Table size difference between master and slaves 1703 Rick James November 17, 2016 06:04PM Sorry, you can't reply to this topic. It has been closed. This forum is currently read only. You can not log in or make any changes. This is a temporary situation. ...
Any difference between Server.MapPath("~") and Server.MapPath("") ? Any easy way to log user activity after they login? Any event after the page load completed? API GET:Obj ref not set to an instance of an object App_code folder in asp.net 3.5 App_Code folder vs. regular folder Ap...
MySQL has many data types for storing string data in the table. VARCHAR and TEXT are two of them. Both can store a maximum of 65535 characters, but there are some differences between these data types described in this tutorial. VARCHAR vs. TEXT: ...
MySQL data types: CHAR, VARCHAR, INT, TEXT #Part-1 MySQL date and time DataTypes Overview: DATE, TIME, DATETIME, TIMESTAMP, YEAR & Zero Values #Part2.1 Automatically insert Current Date and Time in MySQL table #Part – 2.2 MySQL: Working with date time arithmetic #Part 2.3.1 ...
DIFFERENCE BETWEEN "INSERT INTO" AND UNION IN SQL difference between (WITH [tablename] AS) and (DECLARE @[tablename] TABLE) Difference between APP_NAME() and PROGRAM_NAME() difference between char(13) and char(10) Difference Between DB Log File and Transaction log file Difference between JOI...
CREATE FUNCTION getDateDifferenceString(date1 DATE, date2 DATE) RETURNS VARCHAR(30) RETURN CONCAT( /* Years between */ @years := TIMESTAMPDIFF(YEAR, date1, date2), IF (@years = 1, ' year, ', ' years, '), /* Months between */ ...