mysql 5.7 change column type
Every “character” column (that is, a column of type CHAR , VARCHAR , a TEXT type, or any synonym) has a column character set and a column collation. ,If the column has a binary data type ( BINARY , VARBINARY , BLOB ), all the values that it contains must be encoded using a single character set (the character ...
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 mysql 5.7 change column type 相關參考資料
Choosing the Right Type for a Column - MySQL :: Developer ...
MySQL 5.7 Reference Manual / Data Types / Choosing the Right Type for a Column ... For example, if an integer column is used for values in the range from 1 to ... https://dev.mysql.com MySQL 5.7 Reference Manual :: 10.3.5 Column ... - MySQL
Every “character” column (that is, a column of type CHAR , VARCHAR , a TEXT type, or any synonym) has a column character set and a column collation. https://dev.mysql.com MySQL 5.7 Reference Manual :: 10.7 Column ... - MySQL
If the column has a binary data type ( BINARY , VARBINARY , BLOB ), all the values that it contains must be encoded using a single character set (the character ... https://dev.mysql.com MySQL 5.7 Reference Manual :: 11 Data Types - MySQL
MySQL 5.7 Reference Manual / Data Types ... Requirements · 11.8 Choosing the Right Type for a Column · 11.9 Using Data Types from Other Database Engines. https://dev.mysql.com MySQL 5.7 Reference Manual :: 11.3.6 The SET Type - MySQL
SET column values that consist of multiple set members are specified with members separated by commas ( , ). A consequence of this is that SET member ... https://dev.mysql.com MySQL 5.7 Reference Manual :: 13.1.8 ALTER ... - MySQL
To reorder columns within a table, use FIRST and AFTER in CHANGE or MODIFY operations. ALTER ... SET DEFAULT or ALTER ... DROP DEFAULT specify a new default value for a column or remove the old defaul... https://dev.mysql.com MySQL 5.7 Reference Manual :: 13.1.8.2 ALTER ... - MySQL
Generated columns can be added. CREATE TABLE t1 (c1 INT); ALTER TABLE ... https://dev.mysql.com MySQL 5.7 Reference Manual :: 13.1.8.3 ALTER ... - MySQL
13.1.8.3 ALTER TABLE Examples. Begin with a table t1 created as shown here ... https://dev.mysql.com MySQL 5.7 Reference Manual :: 14.13.1 Online DDL ... - MySQL
Changing the index type ( USING BTREE | HASH} ) ALTER TABLE ... Changing the column data type is only supported with ALGORITHM=COPY . Extending ... https://dev.mysql.com Rename a column in MySQL - Stack Overflow
From MySQL 5.7 Reference Manual. Syntax : ALTER TABLE t1 CHANGE a b DATATYPE;. e.g. : for Customer TABLE having COLUMN ... https://stackoverflow.com |