MysqlBLOBVARCHAR

ABLOBisabinarylargeobjectthatcanholdavariableamountofdata.ThefourBLOBtypesareTINYBLOB,BLOB,MEDIUMBLOB,andLONGBLOB.,Fordefinitionsofbinarystringcolumns(BINARY,VARBINARY,andtheBLOBtypes),MySQLinterpretslengthspecificationsinbyteunits.Columndefinitions ...,2012年6月29日—TEXTandBLOBisstoredoffthetablewiththetablejusthavingapointertothelocationoftheactualstorage.VARCHARisstoredinlinewith ...,2011年...

參考資訊如下
13.3.4 The BLOB and TEXT Types

A BLOB is a binary large object that can hold a variable amount of data. The four BLOB types are TINYBLOB , BLOB , MEDIUMBLOB , and LONGBLOB .

13.3.1 String Data Type Syntax

For definitions of binary string columns ( BINARY , VARBINARY , and the BLOB types), MySQL interprets length specifications in byte units. Column definitions ...

Is a blob more efficient than a varchar for data that can be ...

2012年6月29日 — TEXT and BLOB is stored off the table with the table just having a pointer to the location of the actual storage. VARCHAR is stored inline with ...

How do I convert BLOB into VARCHAR in MySQL?

2011年12月25日 — It is in a shared host and I access with Navicat. I have field with BLOB and I want to convert it into VARCHAR. I've tried in the design screen ...

can Mysql or sqlite Blob data type store varchar data in it?

2009年8月4日 — You can store any binary data in a blob. This would include both ascii and unicode text. However, you would need to explicitly interpret ...

Understanding storage sizes for MySQL TEXT data types

TINYTEXT shines over VARCHAR when storing data that's under 255 characters with an inconsistent length and no need to be used for sorting criteria. TEXT: 65,535 ...

BLOB与TEXT区别及性能影响、将BLOB类型转换成 ...

2018年12月11日 — Mysql BLOB、BLOB与TEXT区别及性能影响、将BLOB类型转换成VARCHAR类型 ... MySQL中，BLOB字段用于存储二进制数据，是一个可以存储大量数据的容器，它能容纳 ...

How to Convert BLOB into VARCHAR in MySQL?

2021年11月28日 — Step 5: Changing column Data Type from BLOB to VARCHAR(100). We will be changing the PHOTO column as it is of the BLOB Data Type.

What are the pros and cons of saving an image on a ...

2018年8月22日 — VARCHAR datatype to mainly store the char datatype data only. To store the binary content of the data only we have LOB ( Large Object columns) ...

mysql中的text, blob,varchar（转）

2018年11月15日 — VARCHAR，BLOB 和TEXT类型是变长类型，对于其存储需求取决于列值的实际长度(在前面的表格中用L表示)，而不是取决于类型的最大可能尺寸。例如，一个VARCHAR ...