Shows the structure of a MySQL database (databases, tables, and columns). Usage: mysqlshow [OPTIONS] [database [table [column]]] If last argument contains a shell or SQL wildcard (*,?,% or _) then only what's matched by the wildcard is shown. If no database is given then all ...
SHOW TABLE STATUS [{FROM | IN} db_name] [LIKE 'pattern' | WHERE expr] SHOW TABLE STATUS works like SHOW TABLES, but provides a lot of information about each non-TEMPORARY table. You can also get this list using the mysqlshow --status db_name command. The LIKE clause, if present, ...
SHOW can be used to get information about the structure of INFORMATION_SCHEMA itself. Several SHOW statements accept a WHERE clause that provides more flexibility in specifying which rows to display. INFORMATION_SCHEMA is an information database, so its name is included in the output from SHOW ...
本文主要基于MySQL5.6讲解其用法,因为之后的MySQL版本会去掉show profile功能。 SQL脚本 本篇使用的表结构以及数据如下 /*Table structure for table `dept` */ CREATE TABLE `dept` ( `deptno` int(2) NOT NULL, `dname` varchar(15) DEFAULT NULL, `loc` varchar(15) DEFAULT NULL, PRIMARY KEY (`deptno...
mysql> SHOW CREATE TABLE GroupStructure; +---+---+ | Table | Create Table | +---+---+ | GroupStructure | CREATE TABLE `GroupStructure` ( `gc` smallint(6) DEFAULT NULL, `sgc` smallint(
MySQL SHOW COLUMNS Statement - Learn how to use the MySQL SHOW COLUMNS statement to retrieve information about columns in a table, including data types and default values.
使用Mysql Workbench 创建表方法一: 方法二:运行sql语句创建表CREATETABLElinyi.student1_table(idINTNOTNULL...VARCHAR(45)NOTNULL, sd_addressVARCHAR(45)NOTNULL, PRIMARY KEY (id)); 性格色彩测试android程序开发之九--sqlite数据库 String sql_createtable = "createtabletest(idintNOTNULL,titleVARCHAR(50)NO...
本文主要基于MySQL5.6讲解其用法,因为之后的MySQL版本会去掉show profile功能。 SQL脚本 本篇使用的表结构以及数据如下 /*Table structure for table `dept` */ CREATE TABLE `dept` ( `deptno` int(2) NOT NULL, `dname` varchar(15) DEFAULT NULL, ...
这个过程应该会很快,除非受到其他因素的干扰。例如,在执ALTER TABLE或LOCK TABLE语句行完以前,数据表无法被其他线程打开。正尝试打开一个表。 Removing duplicates 正在执行一个SELECT DISTINCT方式的查询,但是MySQL无法在前一个阶段优化掉那些重复的记录。因此,MySQL需要再次去掉重复的记录,然后再把结果发送给客户端。
·Copying to tmp table on disk The server is copying to a temporarytable on disk. The temporary result set has become too large (seeSection 8.4.4,“Internal Temporary Table Use in MySQL”). Consequently, the threadis changing the temporary table from in-memory to disk-based format to save...