Note that if a string column is being compared with a numeric value, MariaDB will not use the index on the column, as there are numerous alternatives that may evaluate as equal (see examples below). Comparison Examples Converting a string to a number: ...
However, to be able to check by case, the STRCMP() function can be used. It converts the column examined to a string and makes a comparison to the search parameter. SELECT col1, col2 FROM table6 WHERE STRCMP(col3, 'text')=0; If there is an exact match, the function STRCMP() ...
、、、 我有一个Powershell脚本,它运行一个SQL查询,使用ConvertTo-JSON将其转换为JSON,并将其写入文件。然后,我使用Posh-SSH powershell模块将此文件发送到linux服务器。然后,Linux服务器运行一个python脚本来打开文件并将其转换为JSON:with open(fname, 'r') as f: map= json.loads 浏览2提问于2017-06-02...
[root@c79maria10 ~]# rpm -ql $(rpm -qa | grep MariaDB) | grep bin /usr/bin/mariadb /usr/bin/mariadb-access /usr/bin/mariadb-admin /usr/bin/mariadb-binlog /usr/bin/mariadb-check /usr/bin/mariadb-conv /usr/bin/mariadb-convert-table-format /usr/bin/mariadb-dump /usr/bin/ma...
COUNT(*) AS 'Number of Birds' FROM birds, bird_families AS families, bird_orders AS orders WHERE birds.family_id = families.family_id AND families.order_id = orders.order_id AND orders.scientific_name = 'Pelecaniformes' GROUP BY Family; ...
20UPPER(string)Convertstringto uppercaseUPPER(string) Datetime functions: Sybase ASEMariaDB 1CURRENT_BIGDATETIME()Get the current datetime (microseconds)NOW(6) 2CURRENT_BIGTIME()Get the current time (microseconds)CURTIME(6) 3CURRENT_DATE()Get the current date (year, month, day)CURRENT_DATE() ...
NEXTVAL, NO, NOMAXVALUE, NOMINVALUE, NOCACHE, NOCYCLE, NO_WAIT, NODEGROUP, NONE, NOT, NO_WRITE_TO_BINLOG, NULL, NUMBER, NUMERIC, NVARCHAR, OFFSET, OLD_PASSWORD, ON, ONE, ONLINE, ONLY, OPEN, OPTIMIZE, OPTIONS, OPTION, OPTIONALLY, OR, ORDER, OUT, OUTER, OUTFILE, OWNER, PACK_KEYS...
1CAST(string AS DATETIME)Convertstringto datetimeSTR_TO_DATE(string, format) CAST(0x00.. AS DATETIME)Converthexvalue to datetimeCAST and interval expression 2CONVERT(DATETIME, string, style)Convertstringto datetimeSTR_TO_DATE(string, format) ...
(number,decimal_places)//保留小数位数 第二个参数是必选的RAND([seed])//随机数MOD(numerator,denominator )//求余 等价于 数字%数字BIN(decimal_number)//十进制转二进制CONV(number,from_base,to_base)//进制转换HEX(DecimalNumber)//转十六进制LEAST(number, number2 [,..])//求最小值POWER(number,...
1 VARCHAR(n) FOR BIT DATA Variable-length binary string, 1 ⇐ n ⇐ 32672 VARBINARY(n) n ⇐ 65535 Numeric data types: DB2 MariaDB 1 BIGINT 64-bit integer BIGINT 2 DECFLOAT(16 | 34) IEEE decimal floating-point number DOUBLE 3 INT, INTEGER 32-bit integer INT, INTEGER 4...