语法:CREATE [索引类型] INDEX 索引名称ON 表名(列名)WITH FILLFACTOR = 填充因子值0~100GO USE 库名GOIF EXISTS ...
IF EXISTS SELECT FROM SYSINDEXES WHERE NAME IX factory qrcode old dh 检测是否已经存在IX TEST TNAME索引DROP INDEX factory qrcode old.IX factory qrcode old dh 如果存在则删除 创建索引CREATE NONCLUSTERED INDEX IX factory qrco ...
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语法:CREATE [索引类型] INDEX 索引名称ON 表名(列名)WITH FILLFACTOR = 填充因子值0~100GO USE 库名GOIF EXISTS ...
CREATE INDEX DROP INDEX ...
语法:CREATE [索引类型] INDEX 索引名称ON 表名(列名)WITH FILLFACTOR = 填充因子值0~100GO /*实例*/USE 库名GOIF EXISTS (SELECT * FROM SYSINDEXES WHERE NAME='IX_TEST_TNAME')--检测 ...
语法:CREATE [索引类型] INDEX 索引名称ON 表名(列名)WITH FILLFACTOR = 填充因子值0~100GO USE 库名GOIF EXISTS (SELECT * FROM SYSINDEXES WHERE NAME='IX_TEST_TNAME')--检测是否已经存在 ...
SELECTCONCAT('ALTER TABLE `',TABLE_NAME,'` ', 'ADD ', IF( any_value(NON_UNIQUE )= 1, CASE UPPER(any ...
语法:CREATE [索引类型] INDEX 索引名称ON 表名(列名)WITH FILLFACTOR = 填充因子值0~100GO /*实例*/USE 库名GOIF EXISTS (SELECT * FROM SYSINDEXES WHERE NAME='IX_TEST_TNAME')--检测 ...
CREATE INDEX PersonIndex ON 表名 (字段名) DROP INDEX PersonIndex ON 表名 ...
mysql有哪些索引 index 普通索引 alter table table_name add index index_name(column) 最基本的索引,没有任何限制 primary key 主键索引 alter table ...